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2. Gastric nonabsorbable indicators in man: a comparison of phenol red and polyethylene-14C glycol;Domschke, S.; Demling, J.; Domschke, W.; Hacker, J.; Classen, M.; Demling, L.;Scandinavian Journal of Gastroenterology,1973
3. A turbidimetric method for the determination of higher polyethylene glycols in biological materials;Hyden, S.;Kungliga Lantbrukh3gskolans Annaler,1956
4. Total recovery studies of nonabsorbable indicators in the rat small intestine;Miller, D.L.; Schedl, H.P.;Gastroenterology,1970
5. A method for rapid placing of small intestinal perfusion tubes;Schmitt, Jr., M.G.; Wood, C.M.; Soergel, K.H.;Gut,1974