Dr. Paul Cheng who is a practicing medical oncologist and haematologist, founded BCT (Bio Cancer Treatment Ltd), and currently is Honorary Consultant in Medical Oncology, Hong Kong Sanatorium & Hospital. Dr. Cheng has been an Adjunct Associate Professor of Applied Biology and Chemical Technology of the Hong Kong Polytechnic University and was on the faculty of medical school of University of Hong Kong and the medical school of Chinese University of Hong Kong.