1. Department of General Surgery and Urology, Jordan University of Science and Technology, Irbid, Jordan
2. Department of Pathology and Microbiology, Jordan University of Science and Technology, Irbid, Jordan
3. Department of Special Surgery, Jordan University of Science and Technology, Irbid, Jordan
4. Department of Thoracic Surgery, Ruhr District Thoracic Center in Herne, University of Duisburg-Essen Academic Teaching Hospital, Herne, Germany