1. Division of Pediatric Nephrology, Chang Gung Memorial Hospital at Kaohsiung, Kaohsiung, Taiwan
2. Division of Pediatric Nephrology, Chang Gung Memorial Hospital at Kaohsiung, 123 DABI Rd, Niausung, Kaohsiung 833, Taiwan. Tel: +886 7 7317123, ext. 8716. Fax: +886 7 7338009. E-mail: tainyl@seed.net.tw