Thienthanawint, Sukjai, Wisut Kungwantrakul, Jindarat Trakulthong, Siriporn Proungvitaya, and Limthong Promdee. 2014. “Inadequacy of vitamin D and its association with bone markers in orthopedic patients, Siriraj Hospital”. Archives of Allied Health Sciences 26 (2). Khon Kaen, Thailand:205-7. https://he01.tci-thaijo.org/index.php/ams/article/view/66341.