RT Journal Article SR Electronic T1 Complementary medicine: evidence base, competence to practise and regulation JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 481 OP 482 DO 10.7861/clinmedicine.3-5-481a VO 3 IS 5 A1 E Ernst YR 2003 UL http://www.rcpjournals.org/content/3/5/481.2.abstract AB