title: Notice of Retraction: Therapeutic Effects of Umbilical Cord Blood Derived Mesenchymal Stem Cell-Conditioned Medium on Pulmonary Arterial Hypertension in Rats.
authors.affiliation: Department of Biology, School of Life Sciences, Chungbuk National University, Cheongju, Korea.|Department of Surgery, Brain Korea 21 PLUS Project for Medical Sciences and HBP Surgery and Liver Transplantation, Korea University College of Medicine, Seoul, Korea.|Department of Anatomy, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Jae Chul
authors.initials: JC
authors.lastname: Lee
authors.affiliation: Department of Anatomy, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Choong Ik
authors.initials: CI
authors.lastname: Cha
authors.affiliation: Department of Surgery, Brain Korea 21 PLUS Project for Medical Sciences and HBP Surgery and Liver Transplantation, Korea University College of Medicine, Seoul, Korea.
authors.forename: Dong-Sik
authors.initials: DS
authors.lastname: Kim
authors.affiliation: Department of Biology, School of Life Sciences, Chungbuk National University, Cheongju, Korea.
authors.forename: Soo Young
authors.initials: SY
authors.lastname: Choe