[1] Wroclaw Med Univ, Dept Clin Nursing, Wroclaw, Poland
[2] Wroclaw Med Univ, Dept Internal Med Occupat Dis Hypertens & Clin On, Wroclaw, Poland
[3] Jagiellonian Univ, Coll Med, Dept Cardiac & Vasc Dis, Krakow, Poland
[4] Reg Specialist Hosp, Ctr Res & Dev, Wroclaw, Poland