RT Journal Article SR Electronic T1 Introduction JF North Carolina Medical Journal JO N C Med J FD North Carolina Institute of Medicine SP 168 OP 168 DO 10.18043/ncm.64.4.168 VO 64 IS 4 A1 DeFriese, Gordon H. YR 2003 UL http://www.ncmedicaljournal.com/content/64/4/168.abstract AB