Konstantinos Triantafyllou1, Mark Pimentel2. 1. Hepatogastroenterology Unit, Second Department of Internal Medicine - Propaedeutic, Research Institute and Diabetes Center, Medical School, National and Kapodistrian University of Athens, "Attikon" University General Hospital, Athens, Greece. 2. GI Motility Program, Cedars-Sinai Medical Center, Los Angeles, California.