VEGFA and chronic kidney disease: YOP: year of publication; RCT: randomized controlled trial; 99mTc, technetium-99m; RBC: red blood cell; CRF: chronic renal failure; VEGF: vascular endothelial growth factor; APC: argon plasma coagulation; CKD: chronic kidney disease; EGD: esophagogastroduodenoscopy; VCE: video capsule endoscopy; DBE: double balloon enteroscopy; CTA: CT angiography