1. Department of Medical Laboratory Sciences, School of Allied Health Sciences, College of Health Sciences, University of Ghana, P. O. Box KB 143, Korle-Bu, Accra, Ghana
2. Department of Medical Laboratory Sciences, School of Allied Health Sciences, Narh-Bita College, Tema, Ghana
3. The Southern Area Blood Centre, Korle-bu Teaching Hospital, Korle-bu, Accra, Ghana