Relapsing polychondritis (RP) has always struck me as a condition with highly variable implications - and this cluster analysis from the @NIH_NIAMS prospective cohort agrees. There's RP, and then there's RP! @maferradastrong @petercgrayson et al #ACR19 ABST1719 @RheumNow https://t.co/mbfbTxwc6U