Proposal for a Candidate Core Set of Fitness and Strength Tests for Patients with Childhood or Adult Idiopathic Inflammatory Myopathies. van der Stap DK, Rider LG, Alexanderson H, Huber AM, Gualano B, Gordon P, van der Net J, Mathiesen P, Johnson LG, Ernste FC, Feldman BM, Houghton KM, Singh-Grewal D, Kutzbach AG, Munters LA, Takken T; International Myositis Assessment and Clinical Studies Group (including Mastaglia F). Journal of Rheumatology 2016; 43(1):169-176. PMID:26568594. PMCID:4698199