PolymyositisDermatomyositisMyositisHistidine-tRNA LigaseLung Diseases, InterstitialMyositis, Inclusion BodyPrednisoloneMuscular DiseasesAutoantibodiesParaneoplastic SyndromesCreatine KinaseMusclesConnective Tissue DiseasesMuscle, SkeletalScleroderma, SystemicMyoglobinuriaNervous System Autoimmune Disease, ExperimentalAutoimmune DiseasesMediastinal EmphysemaAntibodies, AntinuclearMuscle WeaknessMuscular DystrophiesImmunosuppressive AgentsMixed Connective Tissue Disease