1 | Diagnostic Techniques Unit, Faculty of Health Sciences, Medical University, Lublin, Poland |
2 | Professor W. Orlowski Memorial Hospital, The Centre of Postgraduate Medical Education, Warsaw, Poland |
3 | Institute of Statistics and Demography, Collegium of Economic Analysis, SGH School of Economics, Warsaw, Poland |
4 | Chair and Department of Development in Midwifery, Faculty of Health Sciences, Medical University, Lublin, Poland |
5 | Institute of Rural Health, Lublin, Poland |