RT Journal Article SR Electronic T1 The placebo enigma revisited JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 340 OP 343 DO 10.7861/clinmedicine.11-4-340 VO 11 IS 4 A1 JMS Pearce YR 2011 UL http://www.rcpjournals.org/content/11/4/340.abstract