title: Erratum to: Betulin suppressed interleukin-1b-induced gene expression, secretion and proteolytic activity of matrix metalloproteinase in cultured articular chondrocytes and production of matrix metalloproteinase in the knee joint of rat.
abstract: [This corrects the article on p. 19 in vol. 21, PMID: 28066137.].
authors.affiliation: Department of Orthopedic Surgery, Gangneung Asan Hospital, College of Medicine, University of Ulsan, Gangneung 25440, Korea.
authors.forename: Ho Jong
authors.initials: HJ
authors.lastname: Ra
authors.affiliation: Department of Health Management, Sahmyook University, Seoul 01795, Korea.
authors.forename: Hyun Jae
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Ho Seung
authors.initials: HS
authors.lastname: Jo
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Dae Cheol
authors.initials: DC
authors.lastname: Nam
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Young Bok
authors.initials: YB
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Byeong Hun
authors.initials: BH
authors.lastname: Kang
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Dong Kyu
authors.initials: DK
authors.lastname: Moon
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Dong Hee
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Pharmacology, School of Medicine, Chungnam National University, Daejeon 35015, Korea.
authors.forename: Choong Jae
authors.initials: CJ
authors.lastname: Lee
authors.affiliation: Department of Orthopedic Surgery and Institute of Health Sciences, School of Medicine and Hospital, Gyeongsang National University, Jinju 52727, Korea.
authors.forename: Sun-Chul
authors.initials: SC
authors.lastname: Hwang