[1] Univ Iowa, Stead Family Childrens Hosp, Iowa City, IA 52242 USA
[2] Univ Med Rostock, Rostock, Mecklenburg Vor, Germany
[3] Univ Milan, Int Ctr Assessment Nutr Status, DeFENS, Milan, Italy
[4] Manchester Univ NHS Fdn Trust, Manchester Adult Cyst Fibrosis Ctr, Manchester, Lancs, England
[5] Univ Colorado, Childrens Hosp Colorado, Anschutz Med Campus, Aurora, CO USA
[6] Sydney Childrens Hosp, Randwick & Royal North Shore Hosp, St Leonards, NSW, Australia
[7] Univ New South Wales, Sch Clin Med, Sydney, NSW, Australia
[8] Univ Sydney, Pediat Endocrinol, Camperdown, NSW, Australia
[9] Indiana Univ Sch Med, Pediat Endocrinol, Dept Pediat, Indianapolis, IN 46202 USA
[10] Univ Penn, Dept Pediat, Philadelphia, PA 19104 USA
[11] Childrens Hosp Philadelphia, Div Endocrinol, Philadelphia, PA 19104 USA
[12] Univ Minnesota, Dept Pediat, Minneapolis, MN 55455 USA
[13] Montreal Clin Res Inst, Div Experiemental Med, Montreal, PQ, Canada
[14] Royal Hobart Hosp, Womens & Childrens Serv, Hobart, Tas, Australia
[15] Univ Sydney, Childrens Hosp Westmead, Sydney, NSW, Australia
[16] Univ NSW, Sch Womens & Childrens Hlth, Sydney, NSW, Australia