RT Journal Article SR Electronic T1 Review: clonidine is more effective than placebo for long term smoking cessation, but has side effects JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 19 OP 19 DO 10.1136/ebm.10.1.19 VO 10 IS 1 YR 2005 UL http://ebm.bmj.com/content/10/1/19.abstract AB