THE AUTHORS REPLY.
Horten Centre for Patient Oriented Research and Knowledge Transfer, University of Zurich, Zurich, Switzerland.
Ulrike
U
Held
Clinical Epidemiology and Medical Technology Assessment, University Hospital Maastricht, Maastricht, the Netherlands.
Alfons
A
Kessels
Center for Research and Environmental Epidemiology, Barcelona, Spain.|Hospital del Mar Research Institute, Barcelona, Spain.|Universitat Pompeu Fabra, Barcelona, Spain.|CIBER de Epidemiologia y Salud Pública, Barcelona, Spain.
Judith
J
Garcia Aymerich
Center for Research and Environmental Epidemiology, Barcelona, Spain.|Hospital del Mar Research Institute, Barcelona, Spain.|Universitat Pompeu Fabra, Barcelona, Spain.|CIBER de Epidemiologia y Salud Pública, Barcelona, Spain.
Xavier
X
Basagaña
Department of General Practice, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands.
Gerben
G
Ter Riet
Julius Centre for Health Sciences and General Practice, University Medical Center Utrecht, Utrecht, the Netherlands.
Karel G M
KGM
Moons
Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland.|Department of Epidemiology, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD.
Milo A
MA
Puhan