Trakulkaseamsiri, S., and C. Thapyotha. “Prevalence of hepatitis B, hepatitis C, HIV and syphilis infection in first-time blood donors at queen savang vadhana memorial hospital, Thai Red Cross Society, during 2007-2011”. Journal of Associated Medical Sciences, vol. 45, no. 2, May 2012, p. 14, https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60033.