Pre-treatment laboratory findings of patients.

Abbreviations: CK, creatine kinase; LD, lactic acid dehydrogenase; ALD, aldolase; Cr, creatinine; CRP, C-reactive protein; ANA, antinuclear antibodies; ARS, aminoacyl tRNA synthetase; MDA5, melanoma differentiation-associated gene 5; P[A-a]O2, alveolar-arterial oxygen gradient.Data are presented as the median values (range) or number of subjects. P value was estimated by Fisher's exact test or Mann-Whitney U-test. aNumber of subjects = 16. bNumber of subjects = 3. cNumber of subjects = 2. dNumber of subjects = 11.*Statistical analysis was not performed because of small samples.