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3. Use of air in double contrast barium enema-is it still acceptable?;Taylor, P.N.; Beckly, D.E.;Clin Radiol,1991
4. Pain after barium enema: effect of CO2 and air on double contrast study;Coblentz, C.L.; Frost, R.A.; Molinaro, V.; Stevenson, G.W.;Radiology,1985
5. How much alcohol is sensible?;Smerdon, G.;BMJ,1993