Kalliopi Despoudi, Ioannis Mantzoros, Orestis Ioannidis *, Lydia Loutzidou, Panagiotis Christidis, Christos Chatzakis, Grigorios Gkasdaris, Dimitrios Raptis, Manousos George Pramateftakis, Stamatios Angelopoulos, Thomas Zaraboukas, George Koliakos, Konstantinos Tsalis (Greece)
Corresp. authors' affiliation: * Orestis Ioannidis, MD, MSC, PhD, Surgeon, Scientific Fellow, 4th Academic Department of Surgery, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece