RT Journal Article SR Electronic T1 Functional health illiteracy: What patients don’t know can hurt them JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 355 OP 355 VO 69 IS 5 A1 John D. Clough YR 2002 UL http://www.ccjm.org/content/69/5/355.abstract AB