Principal component analysis of clinical characteristics of pulmonary sarcoidosis with or without extrapulmonary lesions: a single-center observational study in Japan - Maki, Yohei; Miyata, Jun; Suematsu, Ryohei; Sasaki, Hisashi; Kimizuka, Yoshifumi; Fujikura, Yuji; Kawana, Akihiko (Sarcoidosis, Vasculitis and Diffuse Lung Diseases, 2024)