Weight Change After Korean Medicine Weight Management Treatment Combined with a Low-Carbohydrate Diet in Patients with Post-COVID-19 Condition: A Retrospective Multicenter Observational Study - Minwoo Bang; Suyong Shin; Jungsang Kim; Minwhee Kang; Donghun Lee; Junho Kim; Chunghee Kim; Jiyoung Son; Seonghyeon Jeon; Byungsoo Kang (Journal of Korean Medicine, 2026)