1. Knowledge Translation Unit, University of Cape Town Lung Institute; George street Observatory, Cape Town Western Cape South Africa 7700
2. University of Calabar Teaching Hospital (ITDR/P); Institute of Tropical Diseases Research and Prevention; Moore Road Calabar Cross River State Nigeria
3. Indian Council of Medical Research; Division of Child Health; Ansari Nagar New Delhi India 110029
4. Stellenbosch University; Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences; Francie van Zijl Drive Tygerberg Cape Town South Africa 7505