[1] PD Hinduja Natl Hosp & Med Res Ctr, Dept Resp Med, Veer Savarkar Marg, Bombay 400016, Maharashtra, India
[2] PD Hinduja Natl Hosp & Med Res Ctr, Dept Rheumatol, Bombay, Maharashtra, India
[3] Univ Modena & Reggio Emilia, Dept Resp Med, Ctr Rare Lung Dis, Chair Interstitial Lung Dis, Modena, Italy