1. Department of Internal Medicine, Kenyatta National Hospital, Nairobi, Kenya
2. Paediatric Pulmonology, Upperhill Medical Centre, Nairobi, Kenya
3. Department of Resource Development Knowledge Management, Kenya Medical Research Institute (KEMRI), Nairobi, Kenya
4. Department of Medicine, Dermatology and Therapeutics, Kenyatta University, Nairobi, Kenya,
5. Department of Paediatrics and Child Health, University of KwaZulu-Natal, Durban, South Africa,