[1] Taipei Tzu Chi Hosp, Dept Urol, Taipei, Taiwan
[2] Buddhist Tzu Chi Univ, Taipei, Taiwan
[3] Hosp Sick Children, Dept Urol, Toronto, ON, Canada
[4] St Lukes Med Ctr, Inst Urol, Quezon City, Philippines
[5] Boston Childrens Hosp, Dept Urol, Boston, MA USA
[6] Evelina Childrens Hosp, Dept Paediat Nephrourol, London, England
[7] Queen Silvia Childrens Hosp, Dept Pediat, Gothenburg, Sweden
[8] Ghent Univ Hosp, Dept Urol, Ghent, Belgium
[9] Aarhus Univ, Dept Pediat, Aarhus, Denmark
[10] Bambino Gesu Childrens Hosp Rome, Dept Urol, Rome, Italy
[11] Cincinnati Childrens Hosp Med Ctr, Dept Pediat, Cincinnati, OH 45229 USA
[12] Univ Estado Rio De Janeiro, Dept Pediat, Rio De Janeiro, Brazil
[13] Univ Med Ctr Wilhelmina Kinderziekenhuis, Utrecht, Netherlands
[14] St Louis Childrens Hosp, Dept Urol, St Louis, MO 63178 USA