Gonggetyai, G.; Techalertsuwan, N.; Nampoolsuksan, C.; Parakonthun, T.; Swangsri, J.; Methasate, A.; Siriussawakul, A.; Chaiwat, O.; Srinonprasert, V. Frailty and Upper Gastrointestinal Surgery: Initial Findings from Thailand’s First Surgical Frailty Study. Siriraj Med J 2025, 77, 574-582.