1 Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Department of Pediatrics, Hospital Clinico Universitario de Santiago, Travesía da Choupana s/n, 15706 Santiago de Compostela, A Coruña, Spain.
2 Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Metabolic Laboratory, Hospital Clinico Universitario de Santiago, Travesía da Choupana s/n, 15706 Santiago de Compostela, A Coruña, Spain.
3 Unit of Nutrition and Metabolism, Department of Pediatrics, Hospital Clinico Universitario de Santiago, Travesía da Choupana s/n, 15706 Santiago de Compostela, A Coruña, Spain.
4 Rheumatology Service, Hospital Clinico Universitario de Santiago, Travesía da Choupana s/n, 15706 Santiago de Compostela, A Coruña, Spain.
5 Unit of Metabolism, Department of Pediatrics, Hospital de Cruces, Plaza de Cruces s/n, 48903 Barakaldo, Vizcaya, Spain.
7 Unit of Diagnosis and Treatment of Congenital Metabolic Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, CIBERER, Health Research Institute of Santiago de Compostela (IDIS), A Choupana, s/n, 15706 Santiago de Compostela, A Coruña, Spain. Electronic address: maria.luz.couce.pico@sergas.es.