About the Authors

Lidwien A. M. Smit

L.A.Smit@uu.nl

Affiliation Division Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands

Femke van der Sman-de Beer

Affiliation Netherlands Institute for Health Services Research, Utrecht, The Netherlands

Annemieke W. J. Opstal-van Winden

Affiliation Division Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands

Mariëtte Hooiveld

Affiliation Netherlands Institute for Health Services Research, Utrecht, The Netherlands

Johan Beekhuizen

Affiliation Division Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands

Inge M. Wouters

Affiliation Division Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands

Joris Yzermans

Affiliation Netherlands Institute for Health Services Research, Utrecht, The Netherlands

Dick Heederik

Affiliation Division Environmental Epidemiology, Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LAMS FvdS-dB MH IMW JY DH. Analyzed the data: LAMS AWJO-vW JB. Wrote the paper: LAMS. Recruited general practitioners and provided the medical data: FvdS-dB MH JY.