An ergonomic analysis of the effects of camera rotation on laparoscopic performance - Gallagher, Anthony G.; Al-Akash, Musallam; Seymour, Neal E.; Satava, Richard M. (Surgical Endoscopy: And Other Interventional TechniquesOfficial Journal of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES) and European Association for Endoscopic Surgery (EAES), 2009)