Related by context. All words. (Click for frequent words.) 91 Parthenogenetic homozygous stem cell 76 ISCO scientists 64 parthenogenic homozygous stem cell 50 S6 Kinase 46 human parthenogenetic stem 46 ZFP transcription factors 46 pluripotent human 45 adenovirus serotype 45 Human cl 45 pancreatic islet beta 45 accumulate preferentially 45 parthenogenetic stem cells 45 federally funded embryonic 44 hES 44 dengue viruses 44 adipose tissue derived 44 varicella zoster virus VZV 43 New Delhi metallo 43 bone marrow derived mesenchymal 43 factor TNF receptor 43 glucocerebrosidase 43 induce pluripotency 43 beta islets 43 bacteria Streptococcus pneumoniae 43 embryonic progenitor 43 Embryonic stem cells ESCs 43 cell transplantation 43 Wheat gluten 43 adult mesenchymal stem 42 cytotoxin 42 Dip Pen Nanolithography ® 42 P. mirabilis 42 immunomodulators 42 Blastocysts 42 monocyte derived stem cells 42 corneal cells 42 biologically validated targets 42 HepaGam B 42 conserved antigens NP 42 soil bacterium Bacillus 42 acellular 42 hpSC 42 parainfluenza virus 42 Fragile X mental retardation 42 DNA plasmids 42 blastomeres 42 human airway epithelial 41 stromal vascular fraction 41 bacterium Clostridium botulinum 41 Soluble CD# 41 mouse fibroblasts 41 implanting Nadya Suleman 41 glutamic acid decarboxylase 41 Chinese hamster ovary 41 hES cells 41 Shiga toxin 41 protein encoded 41 lentiviral vectors 41 BHT DNA 41 transdifferentiation 41 chronic granulomatous disease 41 radioactive element californium 41 Induced pluripotent stem cells 41 bacterium Mycobacterium tuberculosis 41 recombinant antibodies 40 Epstein Barr Virus EBV 40 chitinase 40 herpes simplex viruses 40 glucocerebrosidase GCD 40 Fc domain 40 peptide antigens 40 reassortant 40 pluripotent embryonic stem cells 40 recombinant adeno associated 40 dependent RNA polymerase 40 progenitor cell 40 albumin naturally occurring 40 marrow reprogram 40 Ataluren 40 lymphoid organs 40 survival motor neuron 40 HuCNS SC ® 40 anti Neu5Gc antibodies 39 Taliglucerase alfa 39 PCV1 39 transfer SCNT 39 B. fragilis 39 nanobodies 39 lentiviral vector 39 oncolytic viruses 39 DepoVax 39 HLA matched 39 kidney urologic 39 Therapeutic cloning 39 nonembryonic 39 Savetz Publishing Inc. 39 Nanoshells 39 live attenuated vaccines 39 maytansinoid 39 polyclonal antibodies 39 POTELLIGENT TM technology 39 Pichia pastoris 39 Recombinant interferon alpha 39 mucus saliva 39 abnormal hematopoietic cells 39 Propionibacterium 39 progenitor stem cells 39 Organ Regeneration Platform 39 Inc. Nasdaq TNGN 39 combining voreloxin 39 Endometrial Regenerative Cells 39 Cloning embryos 38 inhalation anthrax cutaneous anthrax 38 enucleated 38 hemagglutinin H 38 prevent Acquired Immunodeficiency 38 VLPs 38 recombinant polyclonal antibodies 38 deriving stem cells 38 genetically reprogrammed 38 hESC lines 38 human neural stem 38 Salmonella typhi 38 retroviral vectors 38 GRNOPC1 contains 38 budding yeast Saccharomyces 38 radiolabeled antibodies 38 pluripotent stem cells 38 herpesviruses 38 hESCs 38 Therapeutic cloning involves 38 Bacteroides fragilis 38 diagnostic biomarker 38 inherited mutations 38 iPSC lines 38 AdVac ® 38 von Hippel Lindau 38 Malassezia 38 mesenchymal stem cells MSCs 38 Hereditary angioedema HAE 38 induced pluripotent 38 Porcine circovirus 38 journal Cloning 37 HuCAL derived fully 37 SynCon ™ 37 Umbilical cord stem cells 37 Aduro BioTech 37 extracted stem cells 37 protein biochips 37 abnormal prions 37 CMV seropositive 37 reimplanting sperm producing 37 Streptococcus pneumonia 37 cells hESCs 37 Emperor Akihito eldest 37 stem cells harvested 37 oligodendrocyte progenitor cells 37 K ras mutations 37 fatty acid biosynthesis 37 Env protein 37 Bt toxins 37 parainfluenza viruses 37 zinc finger nucleases 37 collagen sponge 37 transgenic animals 37 toxoids 37 causes chickenpox 37 tumor specific antigen 37 transgenic mouse 37 TH# cells 37 parthenogenetic cells 37 Overusing antiviral drugs 37 transplanted bone marrow 37 ESCs 37 pluripotent cells 37 unfertilized mouse 37 proprietary HGS albumin 37 multipotent 37 cadaver derived 37 virulence determinants 37 transplantation HCT 36 adeno associated viruses 36 regenerate diseased 36 tumor antigens 36 stimulating unfertilized eggs 36 MAPCs 36 totipotent 36 Bacteriophages 36 attenuated strain 36 genetically matched 36 Pneumococcus 36 mutated K ras 36 bacterium Clostridium 36 divide asymmetrically 36 abnormal methylation 36 sisters Donna Lovrek 36 cultured stem cells 36 cloned primate 36 pancreatic islet cells 36 Michel Joly 36 neural cells 36 immunologically compatible 36 Inovio proprietary 36 pluripotent embryonic 36 subunit vaccine 36 transgenic animal 36 vesicular stomatitis virus 36 unshelled eggs heated 36 organ Giovannini 36 regenerating bone 36 reprogrammed cells 36 sperm donor offspring 36 pancreatic endocrine 36 Preimplantation genetic diagnosis 36 embryos implanted 36 HLA G 36 Sertoli cells 36 placental stem cells 36 SMN1 36 mouse neural stem 36 teratomas 36 human T lymphotropic 36 cell hESC derived 36 parthenogenetic 35 Marburg Musoke 35 Bone marrow transplantation 35 Bilive TM combined 35 insulin secreting beta 35 exosomes 35 murine leukemia virus 35 AAV vectors 35 parthenogenetic stem cell 35 HSPCs 35 Bt genes 35 simian foamy virus 35 intracytoplasmic sperm injection 35 Epstein Barr virus EBV 35 Sanofi Pasteur ALVAC canary 35 Bordetella pertussis 35 allogeneic 35 parasite Plasmodium falciparum 35 corn borer moths 35 gamma globin gene 35 Campylobacter bacteria 35 Smallpox vaccines 35 ES cells 35 multipotent adult 35 Vesivirus 35 gene rearrangements 35 bacterium Bacillus anthracis 35 chimeric mice 35 clonally 35 PluriCells TM 35 Colloidal silver 35 M. capricolum 35 bioterrorist weapon 35 Maria Leadbeater 35 piggyBac 35 cryopreserved 35 Thoroughly cooking 35 neuraminidase NA 35 Thoroughly cooking eggs 35 myoblasts 35 Prometea 35 chimpanzee adenovirus 35 meganucleases 35 HPRT gene 35 cloning embryos 35 severe congenital neutropenia 35 based cytogenetic diagnostics 35 unspecialized cells 34 antitoxins 34 intra cytoplasmic sperm 34 autologous cells 34 Islet transplantation 34 Inovio proprietary electroporation 34 embryonic stem ES 34 transplantable cells 34 embryonic germ 34 transplantable 34 Pdx1 34 B. henselae 34 Antiviral drugs 34 RPE# 34 leukapheresis 34 bacterium Listeria 34 mRNA transcripts 34 mousepox virus 34 iPS 34 variola virus 34 Sindbis 34 induced pluripotent stem cells 34 vero cells 34 human ESCs 34 infections bloodstream infections 34 mesenchymal cells 34 induced pluripotent stem iPS 34 stemcells 34 biocompatible materials 34 ACTCellerate TM 34 recombinant hepatitis B 34 lymphocytic choriomeningitis virus 34 Mycobacterium tuberculosis bacteria 34 salmonella bacterium 34 platensimycin 34 Ricin toxin 34 protein synthesis machinery 34 defective mitochondria 34 reverse vaccinology 34 ProShares pursuant 34 pluripotent stem cell 34 Angie strives 34 CHD7 34 siderophore 33 bodily tissues 33 hematopoietic cells 33 regulates gene expression 33 implanting embryos 33 Akt1 33 mouse testes 33 mammal cloned 33 Streptomyces 33 malayi 33 AAV vector 33 aneuploid 33 TransVax ™ 33 Benign tumors 33 intranasal vaccine 33 biodegradable nanoparticles 33 placental tissue 33 secrete proteins 33 loaded dendritic cell 33 facilitates umbilical cord 33 chimeric protein 33 insulin producing 33 undifferentiated hESCs 33 HCMV 33 fungus Aspergillus 33 insects Lipkin 33 antisense therapies 33 transplanted islets 33 Sanofi Aventis SA SASY.PA 33 autologous transplant 33 surplus IVF embryos 33 Neu5Gc 33 extract stem cells 33 methylation markers 33 avian strains 33 adult somatic cells 33 glycosylation profile 33 nucleic acids DNA 33 cell lysate 33 chimerism 33 pancreatic cells 33 iPSCs 33 intestinal tissue 33 Ephrin B2 33 cellular immunotherapy 33 intranasal vaccines 33 antibiotic resistance genes 33 default avatar 33 CCR5 mutation 33 mosaicism 33 fertilized embryo 33 islet cells 33 Embryonic stem cells 33 lethal H#N# avian 33 amniotic cells 33 excess IVF embryos 33 obligate intracellular 33 pluripotent meaning 33 unresectable recurrent 33 non adjuvanted 33 iPSC 33 hESC derived 33 Holding AG ROG.VX 33 aspergillosis 33 Mycobacterium leprae 33 immunodeficiency virus 33 fertilized egg splits 32 adenovirus infection 32 Islet cells 32 cloned embryos 32 undergoing hematopoietic stem 32 recombinants 32 donor marrow 32 spider silk proteins 32 Adult stem cells 32 stablemate Curlin 32 CD8 + lymphocytes 32 haematopoietic stem cell 32 DEAR1 32 non mutated KRAS 32 unfertilised 32 maternally inherited 32 eating undercooked meat 32 clone embryos 32 hematopoietic stem cells HSCs 32 haploid 32 MIF protein 32 E. coli STEC 32 cloned embryo 32 addition HANABI automated 32 transgenes 32 tuberculosis bacillus 32 embryonic tissue 32 collagen VII 32 genetically sequenced 32 hpSCs 32 pluripotent 32 ferrets nasal cavities 32 transplants CBTs 32 Enterobacter sakazakii 32 luminal cells 32 B. cepacia 32 lentivirus 32 Without functional ribosomes 32 transplanted tissue 32 Cryopreservation 32 immune suppressing 32 Placentas 32 Prion proteins 32 Cojocaru correspondent 32 Listeria monocytogenes Lm 32 egg yolk proteins 32 donor pancreases 32 pig islets 32 inactivated vaccine 32 inactivated influenza virus 32 Burkholderia 32 gamma secretase activating 32 nonpathogenic 32 teratoma 32 retrovirus XMRV 32 Juravenator 32 embryonic stem cells ESCs 32 virulent pathogens 32 idiotype protein 32 muscle dystrophies 32 bone marrow stem cell 32 fertilized embryos 32 tetanus toxin 32 infected macrophages 32 uncontrolled gusher 32 iPS cells 32 spermatogonial stem cells 32 Tengion clinical 32 Genetic mutations 32 Thorough cooking kills 32 iPS cell 32 vitro fertilization artificial insemination 32 Scotland Roslin Institute 31 unfertilized human 31 Synthetic biologists 31 genetically reprogram 31 Roh Sung il 31 psoriasis vulgaris 31 synthetic genome 31 microfilariae 31 Hoerstrup 31 undifferentiated stem cells 31 insulin secreting islet cells 31 reimplanted 31 fetal stem cells 31 planarians 31 recombinant spider silk 31 mutant mosquitoes 31 genetically manipulated 31 induced pluripotent cells 31 CMV infections 31 reinfusion 31 Methylmercury builds 31 allogenic 31 unfertilized egg 31 multipotent stem cells 31 amniotic epithelial cells 31 SCNT 31 Ebola vaccine 31 microbial nanowires 31 embryonic stem 31 VSELs 31 ovarian tissue 31 genetically manipulating 31 M. genitalium 31 Stem cells 31 intracellular pathogens 31 Umbilical cord blood 31 BRIP1 31 avian swine 31 alphavirus 31 typhimurium 31 stem cell colonies 31 Mycoplasma mycoides 31 paramyxoviruses 31 Cord blood 31 Pluripotent cells 31 lysin 31 Anopheles gambiae mosquitoes 31 chimeric embryos 31 biofactories 31 frozen thawed 31 commonly infect humans 31 stem cells 31 haplotyping 31 Rh positive 31 H7 subtype 31 embryonic stem cells 31 genomic profiling 31 destroying embryos 31 stem cells derived 31 hematopoietic cell 31 OncoVEX 31 M2 protein 30 immune suppressing medication 30 spermatogonial cells 30 protocells 30 primordial germ cells 30 genetic sleuthing 30 virosomes 30 engrafted cells 30 methicillin susceptible MSSA 30 Arabidopsis genome 30 unintimidating foods 30 Variant Creutzfeldt Jakob 30 autologous transplants 30 human immunodeficiency 30 latently infected 30 endogenous retroviruses 30 ovules 30 broadly neutralizing 30 cloned mammal 30 CCR5 gene 30 artificial chromosomes 30 C. difficile bacteria 30 mature oocytes 30 bacterial genome 30 transgenic chickens 30 antisense RNA 30 stem cells MSCs 30 Illumina genotyping 30 Corneas 30 bone marrow transplantation BMT 30 prion strains 30 Entamoeba 30 genetically engineered mouse 30 epigenetic markers 30 pancreatic tissue 30 ATIR ™ 30 VHL gene 30 genome encodes 30 registries handbook Registries 30 ACTCellerate ™ 30 Mycoplasma capricolum 30 FLU v 30 inactivated viruses 30 CMV vaccine 30 curative therapy 30 gamma globulin 30 transgenic pigs 30 Cotsarelis 30 cybrids 30 immunologically matched 30 cryo preserved 30 abnormal chromosomes 30 cloned stem cells 30 immunoadhesins 30 lymphocytic choriomeningitis virus LCMV 30 CCR5 protein 30 genetically mapped 30 filoviruses 30 chromosome rearrangements 30 embryo clones 30 reassortant viruses 30 OnDose TM 30 Tekturna HCT tablets 30 called paraprotein 30 transplanting stem cells 30 biologically compatible 30 telomerase gene 30 Reproductive cloning 29 Bt gene 29 decellularization 29 glycoproteins residing 29 synthetic prions 29 influenza VLP vaccines 29 genetic abnormalities 29 Nayernia 29 Agrobacterium tumefaciens 29 flu virus mutates 29 Listeria infection 29 somatic cell nuclear 29 Muscular dystrophies 29 OrthoCyte 29 amniotic stem cells 29 RDEB 29 Brucella abortus 29 leukemic bone marrow 29 HLA typing 29 human leukocyte antigens 29 human embryonic stem 29 INF2 29 reassortant virus 29 Roche Holding Tamiflu 29 Decoding genome 29 pox viruses 29 Kufs disease 29 stem progenitor cells 29 unfertilised eggs 29 Shiga toxin producing 29 Disclaimer Bioscholar 29 repopulate neural 29 Salmonella Typhi 29 somatic cell 29 Umbilical cord 29 Pluripotent stem cells 29 IPSCs 29 HPV vaccine protects 29 Balamuthia mandrillaris 29 parthenogenesis 29 autogenous bone 29 neural progenitor cells 29 IDH mutations 29 Single Nucleotide Polymorphisms SNPs 29 abnormal hemoglobin 29 P. reichenowi 29 Daniele Fallin 29 unfertilised egg 29 cytoplasmic hybrid 29 GFP gene 29 ovarian transplant 29 Rickettsia 29 inherited retinal degeneration 29 preimplantation genetic diagnosis PGD 29 IVF embryos 29 Karim Nayernia 29 retinal pigment epithelial cells 29 clade B 29 small RNAs encoded 29 genetically altered pigs 29 frozen embryos implanted 29 Bracket busters top 29 bioengineered 29 oocytes 29 cloned embryonic stem 29 recessive mutation 29 meningococcus 29 transgenic monkeys 29 Extracting stem cells 29 Islet cell 29 O# H7 strain 29 biodegradable scaffold 28 Gambotto 28 mammalian organisms 28 regenerative therapies 28 subtyped 28 naturally transgenic honeybees 28 transplanted ovarian 28 miRNA expression profiles 28 normal prion protein 28 chromosome abnormalities 28 HLAs 28 regenerative medicine therapies 28 M. globosa 28 bacterium E. coli 28 variola 28 rDNA construct 28 spermatagonial cells 28 Science CYBEX fitness 28 oviducts 28 CHIKV 28 leftover embryos 28 tendons cartilage 28 Genetically engineered animals 28 blood CellSearch 28 mitochondrial disorders 28 Karayiorgou 28 thawed fertilized 28 DNA deoxyribonucleic acid 28 mutant genes 28 regenerative therapy 28 amniotic stem cell 28 embryonic stemcells 28 vitro maturation 28 H7 virus 28 sea urchin genome 28 girl Hagemen 28 Arnold Kriegstein MD PhD 28 embryos 28 cloned blastocysts 28 further reassort 28 chemistry microbiology immunology 28 extracting stem cells 28 regenerate tissue 28 baker yeast Saccharomyces cerevisiae 28 Prof Wilmut 28 normal gut flora 28 Salmonella bacteria 28 genetically engineered 28 Creutzfeld Jakob disease 28 germline stem cells 28 ES Cell 28 M. paratuberculosis 28 IVF embryo 28 undifferentiated cells 28 progranulin gene 28 exosomes produced 28 bone marrow stem cells 28 anthrax bacterium 28 MizMedi Hospital 28 BSE prions 28 nasal spray influenza 28 homozygous 28 Embryos 28 IgG preparations 28 easily transmissible 28 reinfused 28 Ets2 28 XMRV virus 27 Bioengineered 27 multiply uncontrollably 27 liver regenerates 27 humanized mouse 27 adjuvanted H#N# vaccine 27 umbilical cord stem cells 27 sandcastle worm 27 NF1 gene 27 LMNA 27 sickled red 27 transplanted organ 27 fertilized eggs 27 reprogrammed stem cells 27 Octuplets mom identifies 27 chromosomal anomalies 27 Preimplantation Genetic Diagnosis PGD 27 freeze amnio stem cells 27 herpes virus infection 27 stem cells extracted 27 Russell Bruesewitz 27 abcesses 27 leukaemic cells 27 researcher Woo Suk 27 ovary transplants 27 embryonic cells 27 genetic defects 27 bionic beak 27 genetically modify 27 unfertilized eggs 27 H#N# mutates 27 therapeutic cloning 27 Regenerative Medicine 27 genetically modified 27 Human Leukocyte Antigen 27 bacterium Staphylococcus aureus 27 eggs fertilized 27 HLA identical 27 inherited metabolic disorders 27 Fanconi anemia 27 cytoplasmic hybrids 27 Meckel Gruber 26 somatic stem cells 26 stemcell 26 ITP platelets 26 radiosensitive 26 B streptococci 26 aborted fetal 26 bird flu virus mutates 26 bran endosperm 26 chromosomal DNA 26 Kathy Giusti myeloma 26 asexually 26 dual tropic 26 influenza subtype 26 chromosomally normal 26 H5 strains 26 Gabriela Cezar 26 recessively inherited 26 triploid 26 oocytes eggs 26 Genetically modifying 26 Dr. Cassian Yee 26 Donated organs 26 genome decoded 26 proprietary SignatureChip ® 26 Rohit Shekhar 26 re assort 26 E. coli bacterium 26 embyros 26 stem cell 26 regrow limbs 26 human embryos 26 Ventus Medical 26 bacterial strain 26 mitochondrial defects 26 histocompatibility 26 exomes 26 Fluarix vaccine 26 HBV infected 26 MizMedi 26 transplanted stem cells 26 sequenced genome 26 cloned mule 26 snapdragon flower 26 Corneal transplants 26 bacteriophage virus 25 Snuppy 25 superstrain 25 astute Clinical Ergonomist 25 strain mutates 25 epiblast stem cells 25 HLA molecules 25 testicular biopsy 25 unused embryos 25 blood transfusions organ transplants 25 Fauza 25 mousepox 25 Owning exceptional 25 gametes 25 Mizmedi 25 Tissue Biology 25 H5 influenza 25 reassorted 25 SNPs pronounced snips 25 donor corneas 25 GenBank 25 defective gene 25 conventionally bred 25 mutated virus 25 organizations OPOs 25 pancreases 25 embryo 25 Rhesus disease 25 Embryonic cells 25 Mizmedi Hospital 25 adult stem cells 25 genetically modifying 25 genetically altered 25 cryogenic preservation 25 readily transmissible 25 lifesaving cures 25 genetically defective 25 Convicted RFK 25 Velculescu 25 Grompe 25 Anne Drapkin Lyerly 25 genetic alteration 25 Coronaviruses 25 genetic rearrangements 25 AlloSource delivers 25 idiotype vaccines 24 Lancelot Encore 24 genetically identical 24 fertilization clinics 24 pest resistant 24 Morells embryo 24 antitoxin 24 Dr Zavos 24 Broiler chickens 24 sequenced genomes 24 Stemagen 24 HLA markers 24 bantengs 24 deriving embryonic stem 24 hardier strains 24 infective agent 24 Myelodysplastic syndromes 24 wasting Creutzfeldt Jakob 24 Svalbard vault 24 Verlinsky 24 embryos fertilized 24 Urnovitz 24 cytoplasmic embryos 24 Professor Ian Wilmut 24 clones offspring 24 H5 viruses 24 virulent H#N# 24 reassort 24 portray Hannah Poling 24 mutation 24 pulmonary Pseudomonas aeruginosa 24 Biopump platform 24 autistic enterocolitis 24 intestinal biopsy 24 vaccines 23 EGFR blockers 23 immunodeficiency disorder 23 cow rumen Naczi 23 IDH1 mutations 23 cloned 23 McC kindred 23 planarian 23 genetically altering 23 gametes sperm 23 stem cell therapies 23 coronaviruses 23 tissue scaffolds 23 genetic reassortment 23 liver grafts 23 genetic variability 23 fowl cholera 23 embryo cloned 23 hypoallergenic cats 23 prion gene 23 leukemia lymphoma myelodysplastic syndrome 23 artificially inseminated 23 Voskopoulos real estate 23 HCT Ps 23 cloned monkey 23 infected prairie dogs 23 fertilising eggs 23 Canine influenza 23 stem cell therapy 23 genetically manipulate 23 chromosome abnormality 23 supervirus 23 Dr. Anthony Atala 22 anesthesiology journals 22 genetically engineer 22 vaccine 22 gene sequences 22 pre implantation genetic 22 Wechsler Reya 22 Cryozootech 22 recessive mutations 22 chlamydiosis 22 infertile couples 22 Buzz# unless 22 ethically fraught 22 BioArts International 22 mitochondrial DNA mutations 22 MRC Prion Unit 22 savior sibling 22 MultiGEN 22 cryopreserved embryos 22 bacterial symbiont 22 Cloned cow 22 bird flu mutates 22 cryo preservation 21 Seoul Mizmedi Hospital 21 germ plasm 21 Program CSDW 21 Dr. Eric Genden 21 behaviorally distinct 21 Sapse 21 Anthony Atala 21 umbilical stem cells 21 unspecialized 21 dialed Ybarra 21 mutant fungus 21 untreatable diseases 21 bioengineered mice 21 lissencephaly 21 artificial ovary 21 domino transplant 21 Raelian sect 20 discarded umbilical cords 20 clonal 20 donor livers 20 McGill Reproductive 20 corneal implants 20 genetically diverse 20 influenza virus 20 artificial wombs 20 avian flu mutates 20 umbilical cord stem cell 20 hypoallergenic cat 20 Zain Hashmi 19 genetic mutation 19 Dr. Yewdell 19 bioengineer 19 flu viruses 19 paramyxovirus 19 Brachypodium 19 testicular tissue 18 coronavirus 17 genetic traits 17 Gepstein 17 Renee Reijo Pera 17 genetic blueprints 17 Personalized medicine 16 Genetic testing 16 Genetic sequencing 16 flu virus 16 Reijo Pera 15 transplanting organs 15 magically Woolley 15 clones 15 variant CJD 15 cadaveric donor 15 novelty Schut 14 Dalia Soto del Valle 14 clone 13 genetic makeups 13 genetically 13 aY chromosome 12 biobank 12 Cryobank 12 genetic 12 altruistic donors 9 Hirschsprung