From the ∗Department of Internal Medicine, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

†Department of Internal Medicine (Pulmonology Division), School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

‡Faculty of Medicine, School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

§Department of Internal Medicine (Hematology Division), School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran

∥Lung Diseases Research Center, Ardabil University of Medical Sciences, Ardabil, Iran.

Correspondence to: Hassan Ghobadi, MD, Department of Internal Medicine (Pulmonology Division), School of Medicine, Ardabil University of Medical Sciences, Ardabil, Iran. E-mail: [email protected].

The authors have no funding or conflicts of interest to disclose.