1. Yaoundé Central Hospital; Centre for Development of Best Practices in Health (CDBPH); Henri Dunant Avenue PO Box 87 Yaoundé Centre Province Cameroon
2. Stellenbosch University; Community Health, Faculty of Medicine and Health Sciences; Cape Town South Africa
3. Stellenbosch University; Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences; PO Box 19063 Tygerberg Cape Town South Africa 7505
4. South African Medical Research Council; South African Cochrane Centre; PO Box 19070 Tygerberg Cape Town South Africa 7505