Footnotes

• Contributors WFP, MMM, MFG and JLN provided the clinical care and data interpretation for the patients described herein. APM and PM assisted with data collection and interpretation. KAL serves as manager of the MGH Vasculitis and Glomerulonephritis Clinic, obtained institutional review board approval for this study and provided invaluable insight and recommendations regarding this work as well as interpretation of the data. WFP wrote and prepared the manuscript. All authors participated in reviewing the revised version of the manuscript and approved the final revised version.

• Competing interests None.

• Patient consent Obtained.

• Ethics approval Partners Healthcare System Institutional Review Board.

• Provenance and peer review Not commissioned; externally peer reviewed.