About the Authors

Gudrun Weinmayr

gudrun.weinmayr@uni-ulm.de

Affiliation Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany

Francesco Forastiere

Affiliation Department of Epidemiology, Lazio Regional Health Service, Rome, Italy

Gisela Büchele

Affiliation Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany

Andrea Jaensch

Affiliation Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany

David P. Strachan

Affiliation Division of Community Health Sciences, St. Georges’, University of London, London, United Kingdom

Gabriele Nagel

Affiliation Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany

the ISAAC Phase Two Study Group

Membership of the ISAAC Phase Two Study Group is provided in the Acknowledgments.

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: GW AJ. Contributed to the writing of the manuscript: GW FF GB DS GN. Conducted the fieldwork: ISAAC Phase Two Study group. Read and approved the manuscript: ISAAC.