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(Click for frequent words.) 60 surgical comas 58 plasma ICP 57 plasma mass spectrometry 56 electron spectroscopy 55 drug Pitocin 54 PDGF BB 53 electrochemical sensor 53 Liver Injury 53 photosensitizing agent 53 absorption spectroscopy 52 femtosecond laser pulses 52 induced fluorescence 52 PR interval prolongation 52 VisuMax 52 domain Vertical Alignment 52 Raman scattering 52 protein adsorption 52 alkalosis 52 excimer lasers 52 Nd YAG 52 photochemical reaction 52 mucosal immune responses 52 paralyzing fatalism 51 transcranial 51 biophotonic 51 strong CYP#A# inducers 51 photoluminescence 51 hepatic insulin resistance 51 endogenous interferon alpha 51 Plasmodium infection 51 ricin neutralizing antibodies 51 kainate 50 DPSS lasers 50 cerebral ischemia 50 cyberbullying Steyer 50 vein ablation 50 ultrashort pulses 50 rubidium vapor 50 ultrafast fiber 50 platelet dysfunction 50 overactivation 49 dephosphorylation 49 hippocampal neurogenesis 49 electromotive force 49 optical spectroscopy 49 Nd YAG laser 49 DNA demethylation 49 nonlinear optical 49 Magnetically 49 intermittent hypoxia 49 Hypotension 49 Seasonal allergic rhinitis 49 fluorescence excitation 49 photon laser 49 tardive dyskinesia TD 49 A2E 49 energy dispersive X 49 Perennial allergic rhinitis 49 gastric acid secretion 49 adrenal suppression 49 fluorescence spectroscopy 49 argon fluoride 49 radiofrequency RF 49 wavelength ultraviolet 48 plasmon 48 dysrhythmias 48 photochromics 48 UV Visible 48 PTH secretion 48 chemical peels microdermabrasion 48 microbial biofilms 48 hypomethylation 48 femtosecond fiber 48 airway constriction 48 Femtosecond laser 48 Neuropeptide Y 48 ultraviolet UV light 48 hypokalaemia 48 ultrafast lasers 48 quantum cascade lasers QCLs 48 laser irradiation 48 iodine uptake 48 electromagnetic flux 48 depolymerization 48 radiofrequency RF energy 48 HPA axis suppression 48 CYP #A# 48 insertional mutagenesis 48 Ebola SNALP 48 corona discharge 48 photoactivation 48 nanostructured silicon 48 Scanning Probe Microscopy 48 STAT3 signaling 48 laser ablation 48 Attosecond 48 femtosecond lasers 48 axonal damage 48 Intensified rocket 47 Gisela Winckler 47 temporary wafer bonding 47 Sensorineural hearing loss 47 Cytotoxicity 47 skin rejuvenation Syneron 47 multiphoton imaging 47 photocoagulation 47 IntraLase FS 47 photothermal 47 emit photons 47 ZnSe 47 Nerve impulses 47 helium ions 47 Intravascular 47 ouabain 47 Anaphylactic reactions 47 photic 47 activate p# 47 electromagnetically induced transparency 47 allopregnanolone 47 photon counting 47 intravascular sensors 47 radioactive tracers 47 pressure natriuresis 47 Smac mimetic 47 microelectrode array 47 hyperactivation 47 Focused Ultrasound 47 acute poisonings 47 Transcranial 47 resonance imaging 47 gelsolin 47 Excessive sleepiness 47 PML RARA 47 DEV DA TOMAR NEXT 47 Iodine counteracts 47 femtosecond laser 47 Photodynamic therapy 47 gamma oscillations 47 gastric distension 46 Electrical Stimulation 46 aminoglycoside 46 microcavities 46 Cavity Ring Down 46 spherical aberrations 46 corneal inflammation 46 GABAA receptors 46 oral NSAIDs 46 lymphotoxin 46 Raman spectroscopic 46 Femtosecond 46 dizziness nausea confusion 46 GRNOPC1 cells 46 infrared photons 46 tau phosphorylation 46 amyloid β 46 Nd YAG lasers 46 reliever Tom Mastny 46 optically pumped 46 QT interval prolongation 46 delayed CINV 46 Indium Phosphide 46 photon fluorescence 46 Absorption Spectroscopy 46 radar lidar 46 downregulating 46 Erbium 46 capillary leakage 46 Treg cell 46 nerve degeneration 46 APTIVUS ritonavir 46 potency dosing 46 renal fibrosis 46 lensless imaging 46 Interferon gamma 46 THz radiation 46 enkephalins 46 Endogenous Cushing Syndrome 46 ultraviolet UV 46 hyperexcitability 46 vitamin megadoses 46 Erchonia 46 bioimaging 46 Er YAG 46 ellipsometry 46 MicroPulse 46 photoacoustic imaging 46 Pulsed Light 46 vasoconstriction 46 epileptogenic 46 Ozone depletion 46 Signaling Pathway 46 vitamin B# folic acid 46 obj obj = 46 lipogenesis 46 situ keratomileusis LASIK 46 Epileptic seizures 46 spinal misalignment 46 infantile hemangioma 46 potent cytotoxic 46 arterial calcification 46 BrightLase R 46 cavitations 46 hyperprolactinemia 46 chemiluminescence 46 CoolLipo 46 microcavity 46 broadly tunable 46 Menopausal symptoms 46 anticholinergic effects 46 inflammatory acne comedonal 46 actin polymerization 46 dentinal hypersensitivity 45 platelet activation 45 autoimmune reactions 45 Bladeless LASIK 45 DPSS laser 45 Bruxism 45 hypovolemia 45 thrombus formation 45 TMJD 45 Electron beam 45 Force Microscopy 45 Raman spectroscopy 45 nicotinamide adenine dinucleotide 45 potentiation 45 enhanced Raman scattering 45 argon plasma 45 YAG laser 45 metabolic acidosis 45 #,# DCB 45 NSF NFD 45 wavelength tunable 45 femtosecond laser pulse 45 pulsed lasers 45 Dynamic Light Scattering 45 hypercapnia 45 allodynia 45 .# BA #AB 45 nociception 45 single photon detectors 45 Tongue piercing 45 vertical cavity 45 causative pathogens 45 tumor regression 45 Stimulated Emission 45 renal flares 45 mechanical allodynia 45 genital herpes infections 45 bacterium Francisella tularensis 45 fluorescence microscopes 45 photons emitted 45 Aâ 45 harmonic currents 45 Difficulty swallowing 45 thrombotic complications 45 thermal ablation 45 excitotoxic 45 MEMS microelectromechanical systems 45 PUVA psoralen plus 45 choice mends rift 45 Akt signaling 45 DS DBR 45 Coulomb blockade 45 fluid shear 45 N acetyl 45 TappingMode 45 hyperammonemia 45 wavelength lasers 45 gonadotrophin releasing hormone 45 NSAIDs aspirin 45 gastric distention 45 electron optics 45 Spaser 45 monochromators 45 methemoglobinemia 45 Nanomechanical 45 X ray spectroscopy 45 Pathological gambling 45 laser 45 Tardive dyskinesia 45 serotonin neurons 45 intraventricular 45 hypoperfusion 45 photodynamic therapy 45 Diode lasers 45 electron tunneling 45 surface plasmon 45 Matrix IR fractionalized 45 Rapid prototyping 45 methicillin susceptible Staphylococcus aureus 45 Excitation 45 bacteria Bacillus anthracis 45 Dual Wavelength 45 bi phasic 45 bacterium Bacillus anthracis 45 Raman Spectroscopy 45 reflectometry 45 heterosexual male circumcision 45 laser optics 45 proton MR spectroscopy 45 Pulsed 45 excitotoxicity 45 Diode Laser 45 platelet adhesion 45 glucocorticoid receptors 45 photon microscopy 45 X ray computed tomography 45 ischemia reperfusion 45 swelling stiffness 45 Arthur L. Schawlow 45 inflammatory cytokine 45 severe hypotension 45 Heavier loads 44 adrenocortical 44 thrombosis blood clots 44 Ozone disinfection produces 44 NPM1 mutation 44 mucocutaneous reactions 44 hyperalgesia 44 backscattered 44 circadian misalignment 44 vasodilatation 44 adenylate cyclase 44 neutron beams 44 ceramic coatings 44 nonlinear optics 44 microbubble 44 femtosecond pulses 44 cadmium zinc telluride 44 mediated apoptosis 44 nLIGHT 44 tachypnea 44 Neurogenesis 44 nanoprobes 44 hippocampal atrophy 44 CYP #D# 44 hypobaric hypoxia 44 produced plasma LPP 44 supercontinuum 44 multiphoton 44 nitinol stents 44 hypoxemia 44 brain lesions 44 pen injectors 44 Optical Coherence Tomography OCT 44 hemodynamic instability 44 Nanoprobe 44 near infrared NIR 44 VUV 44 lymphocyte proliferation 44 daytime drowsiness 44 picosecond laser 44 desflurane 44 diathermy 44 cerebral perfusion 44 indocyanine green 44 Ion Trap 44 bladeless LASIK 44 cortical excitability 44 denaturation 44 dopamine depletion 44 QCLs 44 pulsed laser beam 44 Fractionated 44 electroencephalographic 44 lasing 44 diode pumped 44 polynucleotides 44 aldosterone hormone 44 Fiber lasers 44 ACh 44 Laser VCSEL 44 NF kB activation 44 steroid dexamethasone 44 IFN γ 44 aluminum nitride 44 inhibitory effects 44 melatonin receptors 44 radar jammers 44 p# alpha [001] 44 waterborne infectious diseases 44 nutlin 3a 44 diode laser 44 BeamPath 44 vitamin vial 44 frequency combs 44 Systemic lupus 44 contrast chlorine disinfection 44 emits photons 44 Epi LASIK 44 ultrafast laser 44 telomere dysfunction 44 spectroscopic imaging 44 pulse amplitude 44 alveolitis 44 Uncontrolled diabetes 44 Systems Concepts ASCI 44 Spectroscopy 44 acousto optic 44 Thermotherapy 44 attosecond 44 Glucocorticoid 44 lichen planus 44 microstructured 44 Optical Coherence Tomography 44 monoamine 44 realSens ™ 44 fluorescence intensity 44 BrightLase 44 microcurrent 44 genotoxic stress 44 J#A 44 micromechanical 44 nociceptors 44 oligomerization 44 photomultipliers 44 HYPER CEST 44 power amplifier linearization 44 hypothalamic pituitary adrenal axis 44 Acute Bacterial Sinusitis ABS 44 recurrent seizures 44 Prenatal Alcohol 44 Advanced Oxidation 44 photoelectron 44 Richard Sawchak 43 Ytterbium 43 excimer 43 UV VIS 43 vessel constriction 43 prostaglandin E1 43 fatigue skin rashes 43 beta adrenergic receptors 43 overstimulation 43 guinea pigs lubiprostone 43 UV ultraviolet 43 photomultiplier tube 43 telogen effluvium 43 thermogenesis 43 Electro Static Discharge ESD 43 wavelength UV 43 THz imaging 43 inhibiting COX 43 prostaglandin E2 43 EVLT ® 43 terahertz rays 43 KTP laser 43 photocurrent 43 X ray pulses 43 wheelchair Odetta 43 scatterometry 43 emitting lasers 43 atrophic gastritis 43 isozyme 43 Airvana anticipates 43 electromagnetic propulsion 43 femtosecond pulse 43 corneal incisions 43 irreversible blindness 43 wavefront guided LASIK 43 nitric oxide synthase NOS 43 anthropogenically 43 allergic reactions anaphylaxis 43 Hemorrhagic stroke 43 laser diode module 43 YAG lasers 43 quantum cascade 43 Endothelial 43 Orthostatic hypotension 43 diffractive 43 cultured hippocampal neurons 43 INTRABEAM 43 monochromator 43 Diagnostic Radiopharmaceuticals 43 osmotic stress 43 gingival inflammation 43 Juan Encarnacion tiebreaking 43 Spintronic 43 Plaque Psoriasis 43 Near Infrared NIR 43 terahertz quantum cascade 43 harmonic filters 43 effector function 43 Ultra Violet UV 43 Cavitation 43 vasomotor 43 immunotoxicity 43 Spectrometers 43 aspheric optics 43 perinatal asphyxia 43 ERK activation 43 Hua Jinglei 43 QD Laser 43 hepatotoxic 43 myofibroblast 43 Implantable 43 dopaminergic therapy 43 optical aberrations 43 optomechanical 43 androgen suppression 43 ionised gas 43 nociceptive 43 Coblation 43 nonmelanoma skin cancers 43 UV LED 43 faulty electronic throttles 43 torsade de pointes 43 stress induced analgesia 43 opto electronic industries 43 p# activation 43 Breathing ozone 43 serotonin reuptake 43 hCG human chorionic 43 Bi Polar Radio Frequency 43 proprietary patented elos 43 electrosurgical 43 Palomar pioneered 43 pDC 43 micro machining 43 ultrasonics 43 gamma ray radiation 43 Tissue Welding 43 Secondhand smoke exposure 43 Generalized anxiety disorder 43 corneal topography 43 microplate instrumentation 43 psychostimulant 43 hypothalamic pituitary axis 43 extrapyramidal symptoms EPS 43 x ray pulses 43 tissue ablation 43 depression suicidality 43 Vertical Cavity Surface Emitting 43 Electro Optics Society 43 pulsed magnetic 43 bacteria Streptococcus pneumoniae 43 Chronic sleep deprivation 43 placental tissues 43 Radiofrequency 43 airway narrowing 43 Spectrophotometer 43 VCSELs 43 Homeostasis 43 Tubulin 43 tokamaks 43 optical biosensor 43 Nova NanoSEM 43 electromagnetic fields EMFs 43 emitting laser VCSEL 43 ischemia induced 43 resistant mutants 43 ii ultrasonic 43 Ablation 43 intensity modulated 43 Nerve Stimulation 43 epitaxial layer 43 Skin Tightening 43 Anthony Boissiere FRA 43 photon detection 43 esophageal perforation 43 Near Infrared 43 spectroscopy 43 intracavity 43 Estrogen deficiency 43 Daylong rain 43 AnaSpec Introduces 43 Roche xCELLigence System 43 immunological rejection 43 Fetal heartbeats 43 molecule interleukin 43 Tumor Response 43 Neuroprotection 42 galanin 42 neuron degeneration 42 Stress hormones 42 Fractional CO2 42 Chronic renal failure 42 Tachyon NXE 42 IL 1ß 42 photoacoustic 42 quantum cascade laser 42 ultrafast pulses 42 Analyte 42 experimentally induced 42 laser resurfacing 42 IGBT Insulated Gate 42 Vaporization 42 endogenous opioid 42 Vitamin D deficiencies 42 superwide digital inkjet printers 42 Laser Resurfacing 42 piezoelectric transducer 42 anti IgE antibody 42 Interferon Alpha 2b 42 QTc prolongation 42 non ablative 42 topical anesthetic creams 42 induced oxidative stress 42 fiber Bragg gratings 42 subwavelength 42 JENOPTIK GmbH 42 operator Donen 42 Energetiq 42 Cynosure anticipates 42 postoperative atrial fibrillation 42 involuntary muscle spasms 42 GentleLASE 42 lung edema 42 pulmonary inflammation 42 pathologic myopia 42 optical lattices 42 scanning tunneling 42 pralidoxime 42 bacterium Vibrio cholerae 42 ultraviolet laser 42 hepatic toxicity 42 azoospermia 42 proliferative diabetic retinopathy 42 Inc. Nasdaq CUTR 42 intracellular signaling 42 optical coherence tomography OCT 42 CO2 lasers 42 ileus 42 microengineering applications 42 Fraxel Re 42 synchrotron X ray 42 Nasdaq BLTI 42 adrenocorticotropic hormone 42 arginine vasopressin 42 pulsed dye laser 42 symptomatic pulmonary embolism 42 Adaptive optics 42 linacs 42 parkinsonism 42 Ionizing radiation 42 LenSx Lasers 42 fluorescent nanoparticles 42 tri acid digestion 42 GABAergic 42 Forward Looking IVUS 42 Cytomegalovirus CMV 42 argon laser 42 Lyophilized 42 largest polymers petrochemicals 42 periocular 42 Soy isoflavones 42 nitride semiconductor 42 anti Parkinsonian 42 #nm wavelength [001] 42 ultraviolet lasers 42 Antibiotic overuse 42 fractional resurfacing 42 chemically alters 42 behavioral disturbances 42 Technology Microwave Sounder 42 oocyte maturation 42 inhibitory neurotransmitters 42 EEG abnormalities 42 ventricular remodeling 42 abruption 42 serotonin syndrome 42 Acute pancreatitis 42 electrosurgery 42 photon detector 42 neurotransmitters dopamine 42 sympathomimetic 42 Mucositis 42 optic electro magnetic 42 proton radiation 42 nm diode laser 42 Candida overgrowth 42 transmyocardial revascularization 42 Beacon Illuminator Laser 42 p# MAPK 42 synchrotron radiation 42 metallic nanostructures 42 medium spiny neurons 42 NKT Photonics 42 Misfolded proteins 42 upregulation 42 Nanosensors 42 riociguat 42 ultrasonic waves 42 pancytopenia 42 radiofrequency 42 Quantum Dots 42 fungal meningitis 42 Sun.Star Pampanga Sunnex 42 SQUIDs 42 Endovascular Treatment 42 vessel dilation 42 monoamines 42 scanning electron microscopes 42 opto mechanical 42 ultra violet UV 42 Ultrasensitive 42 keratectomy 42 microkeratome 42 Heraeus Noblelight 42 Scanning Laser 42 Reactive oxygen species 42 gold nanorods 42 aluminum gallium nitride 42 IgE mediated 42 telomerase defects 42 delayed onset CINV 42 prion infections 42 modulatory 42 prolactin elevation 42 fluorescence 42 target designators 42 Metastatic prostate cancer 42 Varistors 42 Co2 laser 42 gastrointestinal irritation 42 chemoprotective 42 computed tomographic 42 Raman spectrometer 42 nasal blockage 42 Fraxel laser 42 BriteLight 42 pulsed fiber 42 benzodiazepine receptor 42 Polarized lenses 42 MWIR 42 Photonic crystals 42 K2 Optronics 42 Light Amplification 42 asthmatic symptoms 42 malignant neoplasms 42 laser diode modules 42 Photonic Crystals 42 elos 42 protease activated 42 gamma amino butyric 42 phototoxic reactions 42 neuro transmitters 42 MEK1 42 neuronal receptors 42 Veeco Introduces 42 targeted protein kinase 42 capsaicin receptor 42 irregular menstruation 42 Trigeminal neuralgia 41 qdots 41 renal toxicity 41 Nanoimprint Lithography 41 ovarian hyperstimulation syndrome OHSS 41 diabetes Danesh 41 amplitude modulated 41 laser trabeculoplasty 41 Spectrometry 41 LASIK procedures 41 cardiotoxic 41 malposition 41 hypertrophic scars 41 Chronic HCV 41 Bacterial conjunctivitis 41 Erchonia Medical 41 microkeratomes 41 electron lasers 41 Tissue Doppler 41 hair removal Aesthera 41 imaging spectroscopy 41 Laser ablation 41 Confocal 41 laser pulse 41 diffraction 41 situ keratomileusis 41 cerebral hypoxia 41 scanning electron microscopy 41 bacteria Mycobacterium tuberculosis 41 Inhaled Nitric Oxide 41 nano patterning 41 invasive meningococcal disease 41 ictal 41 LPS induced 41 oxidant stress 41 type 1diabetes 41 metabolic dysfunctions 41 vibrio parahaemolyticus bacteria 41 erbium 41 Optical Coatings 41 coagulopathy 41 radiofrequency waves 41 simplex virus 41 Nanocrystals 41 Superconducting 41 intravascular hemolysis 41 actinic 41 lytic 41 interferon IFN 41 microspectroscopy 41 shearography 41 vasodilatory 41 PDGF alpha receptor 41 fluorescent probes 41 se vere 41 Luminus PhlatLight LEDs 41 Mid Infrared 41 Thyroid disorders 41 tamoxifen metabolism 41 airway hyperresponsiveness 41 Ti sapphire laser 41 SWIR cameras 41 Metamaterials 41 Dehydrogenase 41 plasminogen activator 41 converter topology 41 electret 41 adrenal hormones 41 photon beam 41 optical transceiver modules 41 desipramine 41 titanium sapphire 41 LHRH antagonists 41 Endoplasmic Reticulum 41 unconventional shale formations 41 terahertz frequencies 41 Aptamer 41 ChipVision Design Systems 41 Hepatitis C Infection 41 DNA Methylation 41 HER2 overexpression 41 Polymeric 41 symptom flare ups 41 Decompression 41 Single Photon Emission Computed 41 induced 41 oxidative metabolism 41 bacteria Yersinia pestis 41 Electrostatic 41 EMI Filters 41 Anthrax Toxin 41 Roshelle Gaskins spokeswoman 41 Deep Reactive Ion Etch 41 prothrombotic 41 Infusion Pumps 41 hypertonic 41 paralytic poliomyelitis 41 Involuntary manslaughter involves 41 micro optics 41 neurologic dysfunction 41 locus coeruleus 41 Hepatotoxicity 41 UV lasers 41 cortical activation 41 toric lens 41 portal venous 41 Excimer 41 electron beam welding 41 Fine particulates 41 shortens systolic ejection 41 opioid agonists 41 Magnetic resonance 41 BRAF protein 41 androgen therapy 41 Abdominal Fat 41 Septic shock 41 GaN LEDs 41 Tasigna prolongs 41 hypoxia induced 41 Alexandrite laser 41 oxidative DNA 41 sex hormones estrogen 41 femtosecond 41 toxic amyloid beta 41 Critical limb ischemia 41 RF Amplifiers 41 overdosage 41 transcriptional activation 41 ricin intoxication 41 Hematopoietic 41 promotional code FB# 41 magnetron sputtering 41 Varicose Vein Treatment 41 Cockayne syndrome 41 Exchange IFCN 41 Sublative Rejuvenation 41 Biocompatible 41 ProFire Excel 41 5 HT1A 41 ventricular arrhythmia 41 bacterial translocation 41 pulsed laser 41 murine model 41 VCSEL 41 excitatory neurotransmitter 41 somatostatin 41 antibody mediated 41 chronic rhinosinusitis 41 Atopic dermatitis 41 Nanowire 41 Isotope shortage 41 protein tyrosine phosphatase 41 CT magnetic resonance 41 dose dependently 41 Nano Scale 41 X ray fluorescence 41 serotonin norepinephrine 41 Steril Aire 41 emit X rays 41 Waveguides 41 Atmospheric Pressure 41 galvo 41 fiber lasers 41 Plasmonic 41 Juvederm ™ 41 inertial fusion 41 optical isolator 41 accompanying electrolyte abnormalities 41 liver steatosis 41 SensL 41 tumor regressions 41 Optical Sensors 41 petawatt 41 Laser COIL 41 gastrointestinal adverse reactions 41 familial AF 41 coagulation abnormalities 41 G6PD deficiency 41 diode lasers 41 fever skin rashes 41 DHEA supplementation 41 DIREVO Biotech AG 41 digoxin toxicity 41 violent seismic upheavals 41 Aspheric 41 millimeter wave imaging 41 FVIII inhibitors 41 collimated beam 40 malarial anemia 40 treat seborrheic dermatitis 40 5 HT1A receptor 40 inhibits bacterial 40 Folate deficiency 40 AcrySof 40 intra tumoral 40 ACM Adaptive Coding 40 Treating Chronic 40 molecules Immune SIMULATORS 40 rhythm disturbances 40 detector arrays 40 wind sensor LWS 40 Heavy snorers 40 refractive surgical 40 Neurophysiological 40 arousals 40 Hepatic encephalopathy 40 walled carbon nanotube 40 IR LEDs 40 mediated inhibition 40 Amino acid 40 hemodynamic variables 40 optical coherence tomography 40 Epstein Barr Virus EBV 40 transmyocardial revascularization TMR 40 hypoglycemic episodes 40 UV Vis 40 refractive lens 40 Organic Photovoltaic 40 prenatal exposures 40 lasers 40 c Fos 40 blamed Uighur exiles 40 contractility 40 CEACAM1 40 transgenic mice expressing 40 PLX STROKE targeting 40 Venous Thrombosis 40 neurosteroid 40 vasoconstrictor 40 Isolaz 40 varicoceles 40 iCure 40 Excimer Laser 40 activate AMPK 40 BrightLase ® 40 microscopy techniques 40 neurophysiologic 40 dysplastic lesions 40 photoelectron spectroscopy 40 Vistec Electron Beam 40 polarimetry 40 nanolithography 40 S. aureus infection 40 microfocus 40 corneal flap 40 pulmonary hypoplasia 40 emitting lasers VCSELs 40 quantum dot lasers 40 Leg Ulcers 40 Subdural hematomas 40 intensive statin therapy 40 reproductive abnormalities 40 CMV infection 40 cryotherapy freezing 40 indium gallium arsenide InGaAs 40 scanning electron microscope SEM 40 penile erection