Prognostic significance of the microbiome–adipose tissue axis in rectal cancer: protocol of a prospective observational study. Issue 2 (8th March 2022) - Planellas, Pere; Cornejo, Lídia; Farrés, Ramon; Pigem, Anna; Timoteo, Ander; Ortega, Nuria; Pellino, Gianluca; Rodríguez-Hermosa, José-Ignacio; López-Bonet, Eugeni; Fernández-Real, José Manuel; Codina-Cazador, Antoni