Wong S F, Chow K M, Shek C C, Leung Y P, Chiu A, Lam P W Y, Ho L C
Department of Obstetrics and Gynaecology, Maternal Fetal Medicine Unit, Princess Margaret Hospital, Lai Chi Kok, Kowloon, Hong Kong.
Eur J Clin Microbiol Infect Dis. 2004 Feb;23(2):131-3. doi: 10.1007/s10096-003-1068-2. Epub 2004 Jan 8.