Haplotype 1 A>G, rs28399504 50T>C , rs55752064 55A>C , rs17882687 99C>T, rs17885098 276G>C, rs17878459 395G>A, rs72552267 431G>A, rs17884712 449G>A, rs58973490 636G>A, rs4986893 680C>T, rs6413438 681G>A, rs4244285 991A>G, rs3758581 1228C>T, rs17879685 1251A>C, rs17886522 1297C>T , rs56337013 1473A>C, rs55640102 Ethnic groups Haplotype frequencies Malays Chinese Indians Orang Asli Javanese Saudis CYP2C19*1B A T A T G G G G G C G G C A C A 72.1 63.4 67.2 51.3 79.8 73.7 CYP2C19*2A A T A T G G G G G C A G C A C A 17.4 24.1 28.5 14.9 12.9 9.3 CYP2C19*1A A T A C G G G G G C G A C A C A 1.7 5.0 - 31.2 3.2 6.6 CYP2C19*1C A T A C G G G G G C G G C A C A 3.9 2.5 - <1.0 1.0 1.4 CYP2C19*1 (variant of *1B) A T A T G G G G G C G A C A C A - - - 1.5 - 3.9 CYP2C19*1 (variant of *1C) A T A C G G G G G C G G C C C A - - - - 3.0 - CYP2C19*2 A T A C G G G G G C A G C A C A 2.5 1.1 1.5       CYP2C19*3A A T A T G G G G A C G G C A C A 2.4 3.5 1.7       CYP2C19*12 A T A T G G G G G C G A C A C C - -   - - 1.8 CYP2C19*13 A T A T G G G G G C G G T A C A - -   - - 1.0

Table 4: Haplotypes observed for study populations. Haplotypes observed in singletons are not presented here.