1. School of Public Health, National University of ‘Kyiv-Mohyla Academy’, Skovorody Street 2, Kiev 04655, Ukraine
2. Department of Health Services Research, CAPHRI, Maastricht University Medical Center, Faculty of Health, Medicine and Life Sciences, P.O. Box 616, 6200 MD, Maastricht University, The Netherlands
3. Public Enterprise “MTVC” (“Training, Research and Development Centre”), Verkiu Str., 5, LT-08218 Vilnius, Lithuania
4. Top Institute for Evidence Based Education Research (TIER), P.O. Box 616, 6200 MD, Maastricht University, The Netherlands