RT Journal Article SR Electronic T1 A critique of the VA cooperative study JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 225 OP 230 VO 45 IS 2 A1 Sheldon, William C. A1 Loop, Floyd D. A1 Proudfit, William L. YR 1978 UL http://www.ccjm.org/content/45/2/225.abstract AB