[1] Univ Opole, Dept Hlth Sci, 68 Katowicka St, PL-45060 Opole, Poland
[2] Med & Diagnost Ctr MDC, 9 Niklowa St, PL-08110 Siedlce, Poland
[3] Med Univ Bialystok, Dept Family Med, 1 J Kilinskiego St, PL-15089 Bialystok, Poland
[4] John Paul II Univ Appl Sci Biala Podlaska, Fac Hlth Sci, 95-97 Sidorska St, PL-21500 Biala Podlaska, Poland
[5] Non Publ Healthcare Ctr, Family Phys Practice, 4 Potokiem St, PL-58350 Mieroszow, Poland
[6] Wroclaw Med Univ, Dept Family Med, 1 Syrokomli St, PL-51141 Wroclaw, Poland