1. University Medical Centre, Department of Infectious Diseases, Japljeva 2, 1000 Ljubljana, Slovenia
2. National Institute of Public Health, Trubarjeva 2, 1000 Ljubljana, Slovenia
3. Tom&Tim d.o.o, Smtrnikova 5, 1000 Ljubljana, Slovenia
4. Medical Faculty, Institute for Biostatistics and Medical Informatics, University of Ljubljana, Vrazov trg 2, 1000 Ljubljana, Slovenia