Histological heterogeneity in a large clinical cohort of juvenile idiopathic inflammatory myopathy: analysis by myositis autoantibody and pathological features.

"Conflict of interest The authors declare no conflict of interest. The Editors of Neuropathology and Applied Neurobiology are committed to peer‐review integrity and upholding the highest standards of review. As such, this article was peer‐reviewed by independent, anonymous expert referees and the authors (TJ and JH) had no role in either the editorial decision or the handling of the paper."

"Funding Funding for the UK JDM Cohort and Biomarker study has been provided by generous grants from the Wellcome Trust UK (085860), Action Medical Research UK (SP4252), The Myositis Support Group UK, Arthritis Research UK (14518, 20164), The Henry Smith Charity and Great Ormond Street Children's Charity (V1268), and the National Institute for Health Research (NIHR) Translational Research Collaboration (TRC) Rare Diseases. This research was supported by the NIHR Biomedical Research Centre at Great Ormond Street Hospital for Children NHS Foundation Trust and GOS Institute of Child Health University College London (UCL). The JDM Cohort study is adopted onto the NIHR Comprehensive Research Network. The Arthritis Research UK Centre for Adolescent Rheumatology at UCL, UCL Hospital and GOSH is supported by grants from Arthritis Research UK [20164] and Great Ormond Street Children's Charity. This is a summary of independent research funded by the NIHR's Rare Diseases Translational Research Collaboration and NIHR Biomedical Research Centre at Great Ormond Street Hospital; LW and CD were supported by the NIHR Biomedical Research Centre at Great Ormond Street Hospital. The views expressed are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health."