CXCR2 and clear cell adenocarcinoma: We previously verified that CXCR1/2 were expressed in different human OTC lines and showed that epithelial adenocarcinoma cell lines (OVCAR-3, IGROV-1, and SKOV-3 cells) as well as a clear cell carcinoma cell line (JHOC-5) expressed both CXCR1 (Supplementary Figure S6A) and CXCR2 (Supplementary Figure S6B).