title: [Clinical research advances in the use of retinoids for chemoprevention of oral cancers]
authors.affiliation: Department of Oral & Maxillofacial Surgery,School of Stomatology,Shanghai Second Medical University. Shanghai 200011,China.
authors.forename: X K
authors.initials: XK
authors.lastname: Liu
authors.forename: R G
authors.initials: RG
authors.lastname: He