1. Department of Medicine and Therapeutics, University of Ghana Medical School, University of Ghana, Accra, Ghana
2. Department of Physiology, University of Ghana Medical School, University of Ghana, Accra, Ghana
3. College of Nursing, University of Cincinnati, Cincinnati, USA
4. Department of Medical Biochemistry, University of Ghana Medical School, Accra, Ghana
5. Department of Anaesthesia, Korle-Bu Teaching Hospital, Accra, Ghana