Sa-Ngasoongsong, P., N. Kulachote, N. Sirisreetreerux, P. Chanplakorn, S. Laohajaroensombat, J. Seeraprom, C. Suphachatwong, V. Kawinwonggowit, and W. Wajanavisit. “Outcome of Early Hip Fracture Surgery in Elderly Patients in Ramathibodi Hospital: A Prospective Cohort Study”. Ramathibodi Medical Journal, vol. 36, no. 1, Mar. 2017, pp. 3-12, https://he02.tci-thaijo.org/index.php/ramajournal/article/view/102031.