APOE and oral lichen planus: Our fibroblasts in NEOLP and EOLP shared transcriptional similarity with fibroblasts from skins of scleroderma patients (including CCL19+APOE+CXCL12+ fibroblasts and SFRP2+PRSS23+ fibroblasts), which indicated an overlap between inflammatory features of fibroblasts across OLP and other diseases.