title: [Treatment of periapical diseases with empty root canal therapy: Analysis of causes of failure in 218 cases]
authors.affiliation: Department of Dentistry, Affiliated Hospital, Medical College of Qingdao. Qingdao 266021,China.
authors.forename: C D
authors.initials: CD
authors.lastname: Liu
authors.forename: D Y
authors.initials: DY
authors.lastname: Fu
authors.forename: Y X
authors.initials: YX
authors.lastname: Chen
authors.forename: Y C
authors.initials: YC
authors.lastname: Chou
authors.forename: M Y
authors.initials: MY
authors.lastname: Jia
authors.forename: H Z
authors.initials: HZ
authors.lastname: Li
authors.forename: Z W
authors.initials: ZW
authors.lastname: Zhou