ZDHHC4 and rheumatoid arthritis: Unexpectedly, HLA-DR for dendritic cells (DC1, DC2, plasmacytoid DC, and the recently described DC3 (10, 11)) and monocytes (classical, intermediate, and non-classical) did not differ between RA and HC (Supplementary Figures S8B–G; p > 0.05), nor was there any significant increase in the frequencies of these APC subsets (Supplementary Figures S9A–G, S10A–G; p > 0.05).