1. Department of Endocrinology and Nutrition, Complejo Hospitalario de Navarra (CHN); Hospital García Orcoyen; Instituto de Investigación Sanitaria de Navarra (IdisNa), Navarra, Spain.
2. Section of Endocrinology, Hospital García Orcoyen; Instituto de Investigación Sanitaria de Navarra (IdisNa), Navarra, Spain.
3. Clinical Chemistry Unit, Public Health Laboratory of Basque Government, Derio, Spain.