genetic variation 55 human 43 Humans 35 genetics 33 Genetic Variation 28 Article 26 single nucleotide polymorphism 19 female 18 male 17 article 16 controlled study 16 genotype 15 Polymorphism, Single Nucleotide 13 adult 13 genetic variability 13 phenotype 13 Male 11 gene 11 genomics 11 Female 10 Genetic Predisposition to Disease 10 Genomics 10 Phenotype 10 allele 10 biological model 10 genetic predisposition 10 Genotype 9 genetic association 9 major clinical study 9 nonhuman 9