Figure 1 Example of responses to the surveys regarding classification criteria for Henoch‐Schönlein purpura. The y axis represents percentage consensus. Renal involvement and arthritis were suggested by respondents of the first survey and thus were included in the subsequent second survey. According to the responses concerning the importance of IgA deposition, the “new biopsy” definition in the second survey was sent as “Any biopsy showing IgA deposition.” Respondents also considered renal involvement and arthritis in the second survey and over 80% agreed to add these as new classification criteria. *The original definition of the biopsy was assessed as “vessel wall granulocytes on biopsy” in the first survey.