As shown in Figure 3E and Figure S6B (Supporting Information), expression of α‐smooth muscle actin (α‐SMA), fibroblast activation protein (FAP), and COL1A1 is higher in CAFs than NFs by qRT‐PCR and Western blot, indicating that we successfully established ovarian cancer CAFs and NFs. This evidence concerns the gene COL1A1 and ovarian cancer.