[1] Ovidius Univ Constanta, Fac Med, Dept Pneumol, Constanta 900470, Romania
[2] Univ Med & Pharm Carol Davila, Fac Gen Med, Clin Dept 5, Bucharest 020021, Romania
[3] Colentina Clin Hosp, Dept Occupat Med, Bucharest 020125, Romania
[4] Univ Med & Pharm Grigore T Popa, Dept Med & Palliat Care Nursing 2, Iasi 700115, Romania