1. Center for Neural Engineering, Department of Engineering, Science and Mechanics, Pennsylvania State University, University Park, PA, USA
2. Department of Pathology, Eastern Regional Hospital, P.O. Box 201, Koforidua, Ghana
3. Department of Surgery, Eastern Regional Hospital, P.O. Box 201, Koforidua, Ghana
4. Ministry of Public Health, 1 Brickdam, Georgetown, Guyana
5. Department of Surgery, Penn State Hershey College of Medicine and Milton S. Hershey Medical Center, Hershey, PA, USA