1. Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
2. University of Basel, Basel, Switzerland
3. Department of Electrical Engineering and Computer Sciences, Berkeley Wireless Research Center, University of California Berkeley, Berkeley, California, USA
4. Interuniversity Microelectronics Centre (IMEC), Leuven, Belgium
5. Department of Information Technology, Waves research group, Ghent University