G-6-PD Viangchan is also the most common variant among Cambodians and Laotians
whose countries share a common border with Thailand. The second most common variant was G-6-PD Canton, commonly found among the Chinese population [25,26], followed by G-6-PD Mahidol, most
common in the Myanmar population [14,27], indicating the presence of people originating from these regions in northeast Thailand.