[1] Pontificia Univ Catolica Chile, Sch Med, Dept Gastroenterol & Child Nutr, Div Pediat, Santiago, Chile
[2] Univ Chile, Campus Ctr, Sch Med, Dept Pediat & Pediat Surg, Santiago, Chile
[3] Pontificia Univ Catolica Chile, Sch Med, Div Pediat, Sect Neurol, Santiago, Chile
[4] Pontificia Univ Catolica Chile, Sch Med, Dept Psychiat, Child & Adolescent Psychiat Unit, Santiago, Chile
[5] Pontificia Univ Catolica Chile, Sch Med, Dept Hlth Sci, Phonoaudiol Career, Santiago, Chile
[6] Sch Med Pontificia Univ Catol Chile, Dept Gastroenterol, Santiago, Chile