Tharin Pakdee และ Ubonwon Charoonruangrit. (2009) Detection of Treponema pallidum DNA in blood donors who had positive serological syphillis. Mahidol University:ม.ป.ท.Tharin Pakdee และ Ubonwon Charoonruangrit. 2009. Detection of Treponema pallidum DNA in blood donors who had positive serological syphillis. ม.ป.ท.:Mahidol University;Tharin Pakdee และ Ubonwon Charoonruangrit. Detection of Treponema pallidum DNA in blood donors who had positive serological syphillis. ม.ป.ท.:Mahidol University, 2009. Print.