1. 1NZOZ Pantamed Sp z o.o. w Olsztynie, ul. Pana Tadeusza 6, 10-461, Olsztyn, Poland
2. 2Medical Department, University of Warmia and Mazury in Olsztyn, ul. Żołnierska 14C, 10-900, Olsztyn, Poland
3. 3Cardiology and Internal Diseases Ward, City Complex of Hospitals in Olsztyn, ul. Niepodległości 44, 10-045, Olsztyn, Poland