COL1A1 and gastric cancer: 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