THE NORMAL CHANGE PATTERN OF SERUM PROSTATE-SPECIFIC ANTIGEN LEVEL ACCORDING TO AGE IN HEALTHY KOREAN MENM.S. Shim; C.S. Liu; C.H. Yoo; K.H. Song; K.H. Moon; H. Chung; J.Y. Park; J.H. Lee; T.Y. Ahn; C.S. Kim · 2008