Ketumarn, P., N. Sitdhiraksa, G. Sittironnarit, K. Limsricharoen, P. Pukrittayakamee, and K. Wannarit. “Mental Health Problems of Medical Students Retired from the Faculty of Medicine, Siriraj Hospital, 1982-2007”. Journal of the Psychiatric Association of Thailand, vol. 58, no. 3, Sept. 2015, pp. 271-82, https://he01.tci-thaijo.org/index.php/JPAT/article/view/21137.