RT Journal Article SR Electronic T1 Review: sparse high quality evidence supports surgery for obesity JF Evidence Based Medicine JO Evid Based Med FD BMJ Publishing Group Ltd SP 141 OP 141 DO 10.1136/ebm.10.5.141 VO 10 IS 5 YR 2005 UL http://ebm.bmj.com/content/10/5/141.abstract AB