Comparative effectiveness of several adjuvant therapies after hepatectomy for hepatocellular carcinoma patients with microvascular invasion

Table 1 Literature search criteria

Database	Literature search criteria	Number of literatures
PubMed	((microvascular invasion) OR MVI) AND ((“Carcinoma, Hepatocellular”[Mesh]) OR (hepatocellular carcinoma[Title/Abstract]) OR (liver cancer[Title/Abstract]) OR (hepatoma[Title/Abstract])) AND (resection[Title/Abstract] OR hepatectomy[Title/Abstract]) AND (post-operative[Title/Abstract] OR postoperative[Title/Abstract] OR adjuvant[Title/Abstract] OR prevent[Title/Abstract])	300
Web of Science	(TS = (hepatocellular carcinoma)) AND ((AB = (resection OR hepatectomy)) OR TI = (resection OR hepatectomy)) AND ((TI = (post-operative OR postoperative OR adjuvant OR prevent)) OR AB = (post-operative OR postoperative OR adjuvant OR prevent)) AND ((TI = (microvascular invasion)) OR AB = (microvascular invasion))	250
EMBASE	‘hepatocellular carcinoma’/exp AND (‘resection’/exp OR ‘hepatectomy’/exp) AND (‘adjuvant’/exp OR ‘postoperative’ OR ‘post-operative’ OR prevent:ti OR prevention:ti) AND ‘microvascular invasion’/exp	68