About the Authors

Francisco Pozo-Rodríguez

fpozo@h12o.es

Affiliations Instituto de Investigación, Hospital 12 de Octubre, Madrid Spain, Centre for Biomedical Research on Respiratory Diseases (CIBERES). Instituto de Salud Carlos III, Madrid, Spain

Jose Luis López-Campos

Affiliations Centre for Biomedical Research on Respiratory Diseases (CIBERES). Instituto de Salud Carlos III, Madrid, Spain, Instituto de Biomedicina de Sevilla (IBiS), Hospital Universitario Virgen del Rocío, Seville, Spain

Carlos J. Álvarez-Martínez

Affiliation Instituto de Investigación, Hospital 12 de Octubre, Madrid Spain

Ady Castro-Acosta

Affiliations Instituto de Investigación, Hospital 12 de Octubre, Madrid Spain, Centre for Biomedical Research on Respiratory Diseases (CIBERES). Instituto de Salud Carlos III, Madrid, Spain

Ramón Agüero

Affiliation Hospital Universitario Marqués de Valdecilla, Santander, Spain

Javier Hueto

Affiliation Complejo Hospitalario de Navarra, Pamplona, Spain

Jesús Hernández-Hernández

Affiliation Hospital Nuestra Sra. de Sonsoles, Ávila, Spain

Manuel Barrón

Affiliation Complejo Hospitalario San Millán, Logroño, Spain

Victor Abraira

Affiliations Hospital Universitario Ramón y Cajal, IRYCIS, Madrid, Spain, Centre for Biomedical Research on Epidemiology and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain

Anabel Forte

Affiliation Department of Statistics and Operational Research, Universidad de Castellón, Castellón, Spain

Juan Miguel Sanchez Nieto

Affiliation Hospital Universitario Morales Meseguer, Murcia, Spain

Encarnación Lopez-Gabaldón

Affiliation Hospital Virgen de la Salud, Toledo, Spain

Borja G. Cosío

Affiliations Centre for Biomedical Research on Respiratory Diseases (CIBERES). Instituto de Salud Carlos III, Madrid, Spain, Hospital Universitario Son Espases, Balearic Island, Spain

Alvar Agustí

Affiliations Centre for Biomedical Research on Respiratory Diseases (CIBERES). Instituto de Salud Carlos III, Madrid, Spain, Instituto del Tórax, Hospital Clìnic, Barcelona, Spain

on behalf of the AUDIPOC Study Group

Membership of the AUDIPOC Study Group is provided in the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JLLX CJAM ACA AA. Analyzed the data: FPR JLLC CJAM ACA VA AF. Wrote the paper: FPR JLLC CJAM ACA AA. Principal investigator of the project: FPR. Members of the steering committee/scientific committee of this multicentre study: JLLC CJAM ACA AA. Regional research coordinators and local investigators of the project: RA JH JHH MB VA AF JMSN ELG BGC.