[1] Med Univ Silesia, Fac Med Sci Katowice, Dept Epidemiol, Katowice, Poland
[2] Ctr Postgrad Med Educ, Sch Publ Hlth, Warsaw, Poland
[3] Med Univ Bialystok, Dept Lung Dis & TB 2, Zurawia 14, PL-15540 Bialystok, Poland
[4] Med Univ Lodz, Dept Gen & Oncol Pneumonol, Chair Internal Dis 1, Lodz, Poland
[5] Warsaw Med Univ, Dept Family Med, Warsaw, Poland
[6] Univ Rzeszow, Dept Human Physiol & Pathophysiol, Fac Med, Rzeszow, Poland
[7] Med Univ Lodz, Dept Pneumol & Allergy, Chair Internal Dis 1, Lodz, Poland
[8] Med Univ Lodz, Dept Clin Pharmacol, Chair Internal Dis 1, Lodz, Poland
[9] YankaKupala State Univ Grodno, Dept Sports Med & Rehabil, Grodno, BELARUS
[10] Med Univ Silesia, Fac Med Sci Katowice, Dept Pneumonol, Katowice, Poland
[11] Univ Saskatchewan, Coll Med, Canadian Ctr Hlth & Safety Agr, Saskatoon, SK, Canada
[12] Univ Saskatchewan, Dept Med, Coll Med, Saskatoon, SK, Canada