RT Journal Article SR Electronic T1 Surrogate markers are not ‘one-size-fits-all’ JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 416 OP 416 VO 73 IS 5 A1 Brian F. Mandell YR 2006 UL http://www.ccjm.org/content/73/5/416.abstract AB