1 Department of Pediatrics, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil.
2 Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
3 Cystic Fibrosis Center, Brandenburg Medical School (MHB) University. Klinikum Westbrandenburg, Brandenburg an der Havel, Germany.
4 Cystic Fibrosis Center, Brandenburg Medical School (MHB) University. Klinikum Westbrandenburg, Brandenburg an der Havel, Germany; Faculty of Health Sciences, joint Faculty of the Brandenburg University of Technology Cottbus-Senftenberg, the Brandenburg Medical School Theodor Fontane and the University of Potsdam, Germany.
5 Department of Pediatrics, Faculty of Medical Sciences, State University of Campinas (UNICAMP), Campinas, SP, Brazil. Electronic address: elizete.apl@gmail.com.