This case report received no specific grant from any funding agency.
Conflicts of interest
Maria Sepúlveda, Sara Llufriu, Yolanda Blanco, Núria Solà-Valls, Delon La Puma and Joan Berenguer report no disclosures. Pablo Villoslada reports having received consultancy fees in the last year from Roche, Novartis and Bionure Incorporation. Albert Saiz has received compensation for consulting services and speaking from Bayer-Schering, Merck-Serono, Biogen-Idec, Sanofi-Aventis, Teva Pharmaceutical Industries Ltd. and Novartis.
Ethical standards
All patients and controls provided written informed consent and the local ethics committee approved the study which has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.