A double-blind, parallel group, placebo-controlled study of lactulose in the treatment of encopresis in children with chronic constipation: W. Gleason∗, R. Figueroa-Colon∗∗, L.H. Robinson∗, S. Browder-Hughes∗, R. Phillips∗∗, C. Fleishman†, D. Frank†, and T. Nester†. University of Texas, Houston, TX∗, University of Alabama, Birmingham, AL∗∗ and Solvay Pharmaceuticals, Inc. Marietta, GA†