Affiliation: | (1) Department of Chemical Pathology, The Chinese University of Hong Kong, Hong Kong;(2) Department of Chemical Pathology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong;(3) Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong;(4) Department of Paediatrics, Yan Chai Hospital, Hong Kong;(5) Department of Pathology, Tuen Mun Hospital, Hong Kong;(6) Biochemical Genetics Laboratory, Childrens Hospital of Los Angeles, California, USA |