Verna Vanderpuye1, Joe-Nat Clegg-Lamptey2, Joel Yarney3, Naa Adorkor Aryeetey4. 1. National Center for Radiotherapy and Nuclear Medicine, Korle-bu Teaching Hospital, PO BOX KB 369, Accra, Ghana. vanaglat@yahoo.com. 2. Department of Surgery, Korle-bu Teaching Hospital, Accra, Ghana. clegglamptey@hotmail.com. 3. National Center for Radiotherapy and Nuclear Medicine, Korle-bu Teaching Hospital, PO BOX KB 369, Accra, Ghana. kwodwoahen@gmail.com. 4. National Center for Radiotherapy and Nuclear Medicine, Korle-bu Teaching Hospital, PO BOX KB 369, Accra, Ghana. naardoy@yahoo.com.