1. Department of Clinical Medicine and Therapeutics, University of Nairobi, Ngong Road, Nairobi, Kenya
2. Department of Medicine, Moi Teaching and Referral Hospital, Nandi Road, Eldoret, Kenya
3. Department of Medicine, Aga Khan University Nairobi, 808 Muthaiga Heights, Nairobi, Kenya
4. Department of Medicine, Cardiology Unit, Kenyatta National Teaching and Referral Hospital, Hospital Road, Nairobi, Kenya
5. Imperial Clinical Trials Unit, Imperial College London, Stadium House, 68 Wood Lane, London, UK