Division of Rheumatology, Department of Internal Medicine, Hacettepe University School of Medicine, Ankara, Turkey

Güllü Sandal Uzun, Levent Kılıc & Omer Karadag

Vasculitis Research Centre, Hacettepe University, Ankara, Turkey

Güllü Sandal Uzun, Özay Gököz, Levent Kılıc & Omer Karadag

Department of Pathology, Faculty of Medicine, Hacettepe University, Ankara, Turkey

Özay Gököz

Faculty of Medicine, Department of Pathology, Gazi University, Ankara, Turkey

Betül Oğüt

Pathology Department, Ankara University School of Medicine, Ankara, Turkey

Aylin Heper

Department of Pathology, Ankara City Hospital, University of Health Sciences, Ankara, Turkey

Servet Güreşçi

Department of Internal Medicine, Division of Rheumatology, Faculty of Medicine, Gazi University, Ankara, Turkey

Rıza Can Kardaş & Mehmet Akif Öztürk

Department of Rheumatology, Faculty of Medicine, Ankara University, Ankara, Turkey

Emine Uslu & Aşkın Ateş

Clinic of Rheumatology, Ankara City Hospital, Ankara, Turkey

Berkan Armağan & Ahmet Omma

Turkish Vasculitis Study Group (TRVaS)

Conceived and designed the analysis: GSU,OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK. Collected the data: GSU, OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK. Contributed data or analysis tools: GSU, OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK. Performed the analysis and interpretation of results: GSU, OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK. Draft manuscript preparation: GSU, OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK. Other contribution: GSU, OG, BO, AH, SG, RCK, MAO, EU, AA, BA, AO, LK, OK.

Correspondence to Omer Karadag.