WHAT BARRIERS DO PHYSICIANS FACE FOR MEDICINES PRESCRIPTION IN THE SPANISH NATIONAL HEALTH SERVICE? A SURVEY OF MEDICAL PRESCRIPTION IN MULTIPLE SCLEROSIS - Avendano, C.; Ruiz, B.; Payares, C.; Sancho, A.; del Peral, L. J.; Garcia-Merino, J. A. (Basic & Clinical Pharmacology & Toxicology, 2016)