Related by context. Frequent words. (Click for all words.) 45 allergic diseases 44 H. pylori 44 vitamin D deficiency 44 evolutionary theory 43 hypothesis 42 endocrine disruptors 41 evolutionary biologists 41 triclosan 41 passive smoking 41 genetic susceptibility 41 tooth decay 40 dental decay 40 fluorosis 40 dust mites 40 retrovirus 40 theory 40 Vitamin D deficiency 39 gum disease 39 evolutionists 39 probiotics 39 C. diff 39 periodontitis 39 neurobiological 39 secondhand smoke 39 sedentary lifestyles 39 Darwin theory 39 thimerosal 39 preterm births 39 causative agent 38 bronchiolitis 38 otitis media 38 Thimerosal 38 periodontal disease 38 childhood leukemia 38 epidemiological studies 38 ear infections 38 preterm birth 38 fluoridation 38 creationists 38 SIDS 38 mechanistic 37 inflammatory bowel disease 37 precautionary principle 37 eugenics 37 antibiotic resistant bacteria 37 chelation 37 Darwinian evolution 37 preterm delivery 37 Creationism 37 premature births 37 bacterial infections 37 eczema 37 obesity 37 atopic dermatitis 37 diarrheal disease 36 C difficile 36 vitamin D supplements 36 rotavirus 36 Malthus 36 PFOA 36 diarrheal diseases 36 Lomborg 36 fatty liver disease 36 insulin resistance 36 Pediatrics 36 vitamin D supplementation 36 asthma 36 atherosclerosis 36 genetic variant 36 homeopathy 36 fluoride 35 allergies 35 Cryptosporidium 35 fluoridated water 35 pseudoscience 35 pertussis 35 caloric restriction 35 overdiagnosis 35 PAHs 35 metabolic syndrome 35 vitamin D 35 carcinogenesis 35 pollutant 35 handwashing 35 childhood obesity epidemic 35 epidemiologic 35 Big Bang theory 35 germs 35 etiology 35 rotavirus vaccine 35 pathogenesis 35 sleep disordered breathing 35 MMR vaccine 35 evolutionary biology 35 Darwinists 35 gingivitis 35 causal link 34 preterm infants 34 ATSDR 34 obesity epidemic 34 allergens