1. Pain Unit; Alicante Department of Health-General Hospital; Alicante Spain
2. Neuropharmacology on Pain (NED); Research Unit; Department of Health of Alicante-General Hospital; ISABIAL; Alicante Spain
3. Operative Research Center; Miguel Hernandez University; Elche Spain
4. Clinical Pharmacology Unit; Alicante Department of Health-General Hospital; Alicante Spain