title: Regarding: Impact of the preoperative quantity and quality of skeletal muscle on outcomes after resection of extrahepatic biliary malignancies.
authors.affiliation: Department of Internal Medicine, Gulhane School of Medicine, Haydarpasa Training Hospital, Istanbul, Turkey. Electronic address: usafer@gata.edu.tr.
authors.forename: Umut
authors.initials: U
authors.lastname: Safer
authors.affiliation: Department of Physical Medicine and Rehabilitation, Haydarpasa Numune Training and Research Hospital, Istanbul, Turkey.
authors.forename: Vildan
authors.initials: V
authors.lastname: Binay Safer
mesh_terms: D017734:Bile Ducts, Extrahepatic; D001661:Biliary Tract Neoplasms; D006801:Humans; D018482:Muscle, Skeletal