1. Department of Medicine; University of Calgary; Calgary AB Canada
2. IUMSP; Lausanne University Hospital; Lausanne Switzerland
3. Hypertension in Africa Research Team; North West University; Potchefstroom South Africa
4. MRC Research Unit on Hypertension and Cardiovascular Disease; North-West University; South Africa
5. Douala School of Medicine; University of Douala; Douala Cameroon
6. Cameroon Society of Epidemiology and Health Operations Research; Ministry of Public Health of Cameroon; Yaounde Cameroon