SFRP2 and endometriosis: The results indicated that the C1 SFRP2+ Fibroblast and C3 RAMP1+ Fibroblast subpopulations predominantly originated from the Endometriosis tissue type, while the C0 FHL2+ Fibroblast and C2 CXCR4+ Fibroblast subpopulations were mostly derived from the Endometriomas tissue type.