CD180 and systemic sclerosis: Similarly, RP105 expression was reduced in ASMA+ myofibroblasts, as shown by double immunofluorescence using healthy and SSc skin biopsies (r = –0.38, P = 0.04; Pearson’s correlation), without showing any significant difference in the expression levels between healthy controls and patients with SSc (Supplemental Figure 1; supplemental material available online with this article; https://doi.org/10.1172/jci.insight.160684DS1).