1. Regional Hospital Limbe, South West, P.O. Box 219, Limbe, Cameroon
2. Helen Keller International, Yaoundé, Cameroon
3. Department of Nutrition, University of North Carolina at Greensboro, Greensboro, NC, USA
4. Department of Biochemistry, University of Bamenda, Bamenda, Cameroon
5. Higher Teacher's Training College, University of Maroua, Maroua, Cameroon
6. Faculty of Sciences, University of Yaounde 1, Yaoundé, Cameroon
7. Faculty of Medicine and Biomedical Sciences, University of Yaounde 1, Yaoundé, Cameroon
8. Faculty of Sciences, Department of Biochemistry, University of Yaounde 1, Yaoundé, Cameroon