Clinical Characteristics of an Internet-Based Cohort of Patient-Reported Diagnosis of Granulomatosis With Polyangiitis and Microscopic Polyangiitis: Observational Study

Jason Michael Springer   ^{1 *} , MD, MS ;   Tanaz A Kermani   ^{2 *} , MD, MS ;   Antoine Sreih   ³ , MD ;   Dianne G Shaw   ⁴ , MA ;   Kalen Young   ⁴ , MA ;   Cristina M Burroughs   ⁵ , BS ;   Peter A Merkel   ^{3, 6} , MD, MPH

¹ University of Kansas Medical Center, Kansas City, KS, United States

² Division of Rheumatology, Department of Medicine, University of California, Santa Monica, CA, United States

³ Division of Rheumatology, Department of Medicine, University of Pennsylvania, Philadelphia, PA, United States

⁴ Vasculitis Foundation, Kansas City, MO, United States

⁵ Health Informatics Institute, University of South Florida, Tampa, FL, United States

⁶ Division of Clinical Epidemiology, Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia, PA, United States

*these authors contributed equally