1 Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland. vasileios.nittas@uzh.ch.
2 Graduate School of Health Sciences, Institute of Social and Preventive Medicine, University of Bern, Bern, Switzerland.
3 Environmental Exposures and Health Unit, Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.
4 Swiss Centre for International Health, Swiss Tropical and Public Health Institute, Basel, Switzerland.
5 University of Basel, Basel, Switzerland.
6 Institute of Global Health, University of Geneva, Geneva, Switzerland.
7 Centre for Health Systems Research, Global Health Program, National Institute of Public Health, Cuernavaca, Mexico.
8 Department of Medical Parasitology and Infection Biology, Swiss Tropical and Public Health Institute, Basel, Switzerland.