RT Journal Article SR Electronic T1 Series Introduction JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 24 OP 24 DO 10.3949/ccjm.78a.10179 VO 78 IS 1 A1 Timothy Gilligan YR 2011 UL http://www.ccjm.org/content/78/1/24.abstract AB