[1] HACETTEPE UNIV,FAC MED,DEPT CHEST DIS,ANKARA 06100,TURKEY
[2] GEN SOCIAL INSURANCE AGCY HOSP,DEPT CHEST DIS,ELAZIG,TURKEY
[3] CUKUROVA UNIV,FAC MED,DEPT CHEST DIS,ADANA,TURKEY
[4] DOKUZ EYLUL UNIV,FAC MED,DEPT CHEST DIS,IZMIR,TURKEY
[5] ONDOKUZ MAYIS UNIV,FAC MED,DEPT CHEST DIS,SAMSUN,TURKEY