COL1A1 and oral cavity squamous cell carcinoma: These results together suggested that H19 promoted PRCC tumorigenesis by competitively binding miR‐29c‐3p to alleviate inhibition of COL1A1, which has recently been shown to act as an oncoprotein in oral squamous cell carcinoma, gastric cancer, and ovarian cancer.54, 55, 56, 57, 58