Affiliation: | (1) Department of Surgery, Section of Minimally Invasive Surgery, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box #8109, St. Louis, MO 63110, USA;(2) Division of Comparative Medicine, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box #8109, St. Louis, MO 63110, USA; |