1. Institute of Work and Health (IST); University of Lausanne and Geneva; Route de la Corniche 2, 1066 Epalinges, Lausanne Switzerland
2. Cancer Epidemiology Unit; University Institute of Social and Preventive Medicine (IUMSP); Centre Hospitalier Universitaire Vaudois and University of Lausanne; 10 route de la Corniche 1010 Lausanne Switzerland
3. Federal Office of Meteorology and Climatology (MeteoSwiss); chemin de l'Aérologie; 1530 Payerne Switzerland