RT Journal Article SR Electronic T1 Sertraline maintenance treatment reduced relapse and dropouts in post-traumatic stress disorder JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 149 OP 149 DO 10.1136/ebm.7.5.149 VO 7 IS 5 YR 2002 UL http://ebm.bmj.com/content/7/5/149.abstract AB