RT Journal Article SR Electronic T1 Dapsone-induced methaemoglobinaemia in relapsing polychondritis JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e252431 DO 10.1136/bcr-2022-252431 VO 15 IS 9 A1 Tomohiro Yoshida A1 Keisuke Nishimura A1 Hiroyuki Murabe A1 Toshihiko Yokota YR 2022 UL http://casereports.bmj.com/content/15/9/e252431.abstract AB