Affiliation: | (1) Department of Surgery, German Clinic of Santiago, Santiago, Chile;(2) Department of Surgery, Clinical Hospital University of Chile, Santos Dumont 999, Independencia, Santiago, Chile;(3) Department of Medicine, Clinical Hospital University of Chile, Santiago, Chile;(4) Department of Medicine, German Clinic of Santiago, Santiago, Chile;(5) Faculty of Medicine, University of Desarrollo-German Clinic, Santiago, Chile |