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To the Editor The study by Dr Arterburn and colleagues1 found lower mortality among obese patients in the Veterans Affairs (VA) health system receiving bariatric surgery compared with matched controls not receiving surgery. The authors did not account for several relevant sources of selection bias introduced by the VA bariatric surgery eligibility criteria.2
Murali SB. Long-term Survival Following Bariatric Surgery in the VA Health System. JAMA. 2015;313(14):1473-1474. doi:10.1001/jama.2015.2580