1. Community Health Centre Ljubljana, Primary Healthcare Research and Development Institute , Metelkova 9, 1000 Ljubljana , Slovenia
2. Institute of Tropical Medicine Antwerp , Antwerp Belgium
3. University of Antwerp , Antwerp Belgium
4. University of Ljubljana, Faculty of Medicine, Department of Family Medicine , Poljanski nasip 58, 1000 Ljubljana , Slovenia
5. University of Maribor, Faculty of Medicine, Department of Family Medicine , Taborska 8, 2000 Maribor , Slovenia