Díaz-Sánchez A, Carrión G, Barreiro A, Ortiz C, De Fuenmayor M L, Gimeno M, Ponferrada A, Martín S, Aldeguer M
Service of Digestive Diseases, Hospital Infanta Leonor, Madrid, Spain.
Rev Esp Enferm Dig. 2009 Aug;101(8):568-70. doi: 10.4321/s1130-01082009000800008.