Faculty of Medicine, "Carol Davila" University of Medicine and Pharmacy, 050474 Bucharest, Romania. Department of Hematology, Center of Hematology and Bone Marrow Transplantation, Fundeni Clinical Institute, 022328 Bucharest, Romania. Department of Pathophysiology, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania. Department of Dermatology, "Elias" University Emergency Hospital, 011461 Bucharest, Romania. Department of Gastroenterology, Colentina Clinical Hospital, 20125 Bucharest, Romania. Department of Internal Medicine, Clinical Emergency Hospital of Bucharest, 14461 Bucharest, Romania. Clinic of Hematology, Filantropia City Hospital, 200143 Craiova, Romania.