[1] Univ Iceland, Fac Med, Reykjavik, Iceland
[2] Landspitali Univ Hosp, Dept Gastroenterol & Hepatol, Reykjavik, Iceland
[3] Univ Malaga, Univ Hosp Virgen Victoria, Dept Pharmacol & Pediat, Serv Farmacol Clin,IBIMA Plataforma Bionand, Malaga, Spain
[4] Univ Malaga, Univ Hosp Virgen Victoria, Dept Med, Serv Digest,IBIMA Plataforma Bionand, Malaga, Spain