1. Pediatrics Department, Centro Materno-Infantil do Norte, Centro Hospitalar Universitário do Porto, Porto 4050-651, Portugal
2. Pediatrics Department, Hospital Central do Funchal, Funchal 9000-177, Portugal
3. Reference Center for Inherited Metabolic Disorders, Centro Materno-Infantil do Norte, Centro Hospitalar Universitário do Porto, Porto 4050-651, Portugal
4. Pediatric Nutrition Unit, Pediatrics Department, Centro Materno-Infantil do Norte, Centro Hospitalar Universitário do Porto, Porto 4050-651, Portugal