1. Department of Analytical Chemistry, Instituto Químico para la Energía y el Medioambiente, Marie Curie Building (Annex), Campus of Rabanales, Universidad de Córdoba, 14071 Córdoba, Spain
2. Anti-Doping Control Laboratory, Spanish Agency of Health Protection in Sport (AEPSAD). C/ Pintor el Greco S/N, 28040 Madrid, Spain