[1] Natl Taiwan Univ, Natl Taiwan Univ Hosp, Dept Pediat, Taipei 10764, Taiwan
[2] Natl Taiwan Univ, Coll Med, Taipei 10764, Taiwan
[3] Taipei City Hosp, Branch Women & Children, Dept Pediat, Taipei, Taiwan
[4] Natl Taiwan Univ, Natl Taiwan Univ Hosp, Dept Surg, Taipei 10764, Taiwan
[5] Natl Taiwan Univ, Natl Taiwan Univ Hosp, Dept Internal Med, Taipei 10764, Taiwan