1. Division of Clinical Sciences: Renal Medicine; St George's, University of London; London; UK
2. Clinical Trials Unit; St George's, University of London; London; UK
3. Department of General Intensive Care; St George's Hospital; London; UK
4. Universiti Brunei Darussalam; PAP Rashidah Sa'adatul Bolkiah Institute of Health Sciences; Brunei; Darussalam
5. Analytical Services International, Ltd; St George's, University of London; London; UK