[1] Johns Hopkins Univ, Eudowood Div Pediat Resp Sci, Baltimore, MD 21218 USA
[2] Johns Hopkins Univ, Dept Pediat, Baltimore, MD 21218 USA
[3] Childrens Hosp Wisconsin, Dept Speech Language Pathol, Milwaukee, WI 53201 USA
[4] Med Coll Wisconsin, Dept Pediat, Milwaukee, WI USA
[5] Infermi Hosp, ENT Dept AUSL Romagna, Audiol Phoniatr Serv, Rimini, Italy
[6] Univ Fed Rio Grande do Sul, Dept Hlth & Human Commun, Porto Alegre, RS, Brazil
[7] Hosp Clin, Dept Speech Pathol & Audiol, Porto Alegre, Brazil
[8] Hosp Clin Porto Alegre, Multiprofess Hlth Residency Program, Porto Alegre, Brazil
[9] Nationwide Childrens Hosp, Res Inst, Div Neonatol, Columbus, OH USA
[10] Nationwide Childrens Hosp, Res Inst, Div Pediat Gastroenterol, Columbus, OH USA
[11] Nationwide Childrens Hosp, Res Inst, Div Nutr, Columbus, OH USA
[12] Ohio State Univ, Coll Med, Columbus, OH USA