1 Department of Gastroenterology, Hospital General de Tomelloso, Tomelloso, Ciudad Real, Spain; Department of Gastroenterology, Hospital San Pedro de Alcántara, Cáceres, Spain. Electronic address: alucendo@vodafone.es.
2 Department of Gastroenterology, Hospital General de Tomelloso, Tomelloso, Ciudad Real, Spain; Department of Gastroenterology, Hospital San Pedro de Alcántara, Cáceres, Spain.