Singhapanupong C, Pathonsmith C. Association between Frailty and All-Cause In-hospital Mortality in Elderly Patients in Internal Medicine Wards, Vajira Hospital. J. Med. Urban Health [internet]. 2026 May 15 [cited 2026 Sep. 15];70(3):e7481. available from: https://he05.tci-thaijo.org/index.php/jmuh/article/view/7481