Authors: Mahmoud Alhaj Ali; Abdu Adem; Irwin S Chandranath; Sheela Benedict; Javed Y Pathan; Nicolas Nagelkerke; Fred Nyberg; Lynley K Lewis; Tim G Yandle; Gary M Nicholls; Chris M Frampton; Elsadig Kazzam Journal: PLoS One Date: 2012-05-18 Impact factor: 3.240