1. Department of Applied Science, Hong Kong Institute of Vocational Education (Shatin), 21 Yuen Wo Road, Shatin, New Territories, Hong Kong; Macao Society for the Study of Women's Health, Macao.
2. Department of Pathology, Ruttonjee Hospital, 266 Queen's Road East, Wan Chai, Hong Kong.
3. School of Biomedical Sciences, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW 2678, Australia.