Correction to: Risk of progression of idiopathic pulmonary fibrosis to connective tissue disease: a long-term observational study in 527 patients

Affiliations

• ¹ Division of Rheumatology, Jeju National University School of Medicine, Jeju National University Hospital, Jeju, Republic of Korea.
• ² Division of Rheumatology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea.
• ³ Division of Rheumatology, University of Ulsan College of Medicine, Ulsan University Hospital, Ulsan, Republic of Korea.
• ⁴ Division of Rheumatology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, Republic of Korea. cklee@amc.seoul.kr.