APCDD1L and rheumatoid arthritis: Of the four remaining CpGs, according to the EWAS Catalog, one (cg23487201 at APCDD1L) has previously been associated with clear cell carcinoma and pancreatic ductal adenocarcinoma and another (cg00039564 at TAX1BP1) has previously been found to be associated with rheumatoid arthritis.