1 Department of Oncology, Fundeni Clinical Institute, Bucharest, Romania.
2 Faculty of Medicine, Titu Maiorescu University, Bucharest, Romania.
3 Department of Gastroenterology, Elias Emergency University Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania.
4 Department of Gastroenterology, Hepatology and Nutrition-Unit 1466, University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd., Houston, TX, 77030-4009, USA. manoop.bhutani@mdanderson.org.