The Association Between Serum Gamma‐Glutamyl Transferase and Gastrointestinal Cancer Risk: A Systematic Review and Meta‐Analysis. - Ramandi, Alireza; George, Jacob; Behnoush, Amir Hossein; Delavari, Alireza; Mohammadi, Zahra; Poustchi, Hossein; Malekzadeh, Reza (Cancer Medicine, 2025)