1 Division of Hepatobiliary and Pancreatic Surgery, University of Pittsburgh Medical Center, Kaufmann Medical Building, 3471 Fifth Ave., Suite 300, Pittsburgh, PA, 15213, USA. rebeard@gmail.com.
2 St. Clair Hospital, Pittsburgh, PA, USA.
3 Division of Hepatobiliary and Pancreatic Surgery, University of Pittsburgh Medical Center, Kaufmann Medical Building, 3471 Fifth Ave., Suite 300, Pittsburgh, PA, 15213, USA.