First national survey on the diagnosis of Helicobacter pylori infection in Clinical Microbiology Laboratories in Spain Ana Miqueleiz-Zapatero; Claudio Alba-Rubio; Diego Domingo-García; Rafael Cantón; Elia Gómez-García de la Pedrosa; Esteban Aznar-Cano; José Leiva; Milagrosa Montes; Isabel Sánchez-Romero; Juan Carlos Rodríguez-Díaz; Teresa Alarcón-Cavero;