RT Journal Article SR Electronic T1 Rational prescribing: the principles of drug selection JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 481 OP 485 DO 10.7861/clinmedicine.9-5-481 VO 9 IS 5 A1 Simon Maxwell YR 2009 UL http://www.rcpjournals.org/content/9/5/481.abstract