PT - JOURNAL ARTICLE AU - Hisanori Umehara AU - Mitsuhiro Kawano TI - Response to: ‘Serum complement factor C5a in IgG4-related disease’ by Fukui <em>et al</em> AID - 10.1136/annrheumdis-2018-213729 DP - 2018 Jun 06 TA - Annals of the Rheumatic Diseases PG - annrheumdis-2018-213729 4099 - http://ard.bmj.com/content/early/2018/06/06/annrheumdis-2018-213729.short 4100 - http://ard.bmj.com/content/early/2018/06/06/annrheumdis-2018-213729.full