Percutaneous transhepatic vs. endoscopic retrograde biliary drainage for suspected malignant hilar obstruction: study protocol for a randomized controlled trial oleh Firas Al-Kawas, Harry Aslanian, John Baillie, Filip Banovac, Jonathan M. Buscaglia, James Buxbaum, Amitabh Chak, Bradford Chong, Gregory A. Coté, Peter V. Draganov, Kulwinder Dua, Valerie Durkalski, B. Joseph Elmunzer, Lydia D. Foster, Timothy B. Gardner, Brian S. Geller, Priya Jamidar, Laith H. Jamil, Rajesh N. Keswani, Mouen A. Khashab, Gabriel D. Lang, Ryan Law, David Lichtenstein, Simon K. Lo, Sean McCarthy, Silvio Melo, Daniel Mullady, Jose Nieto, J. Bayne Selby, Vikesh K. Singh, Rebecca L. Spitzer, Brian Strife, Paul Tarnaksy, Jason R. Taylor, Jeffrey Tokar, Andrew Y. Wang, April Williams, Field Willingham, Patrick Yachimski, In alphabetical order for the INTERCPT Study Group and the United States Cooperative for Outcomes Research in Endoscopy (USCORE)