human 5 pharmacogenomics Article 4 Humans 4 adult 4 male 4 Pharmacogenetics 3 female 3 gene frequency 3 genetic variability 3 single nucleotide polymorphism 3 Asian Continental Ancestry Group 2 CYP2C19 gene 2 Female 2 Genotype 2 High-Throughput Nucleotide Sequencing 2 Malaysia 2 Male 2 Middle Aged 2 Polymorphism, Single Nucleotide 2 allele 2 controlled study 2 cytochrome P450 2C19 2 drug metabolism 2 drug response 2 gene function 2 gene identification 2 genetic association 2 genetic variation 2 genotype 2