Suwannayod, T. (2015) “Carcinoembryonic Antigen (CEA) and CA 19-9 Levels in Patients Attended at Lerd-Sin Hospital, Bangkok”, Journal of Associated Medical Sciences, 33(1), p. 6. Available at: https://he01.tci-thaijo.org/index.php/bulletinAMS/article/view/60293 (Accessed: 19 May 2024).