Mechanical bowel preparation for elective colorectal surgery; a prospective, randomized, surgeon-blinded trial comparing sodium phosphate and polyethylene glycol based oral lavage solutions - Oliveira,L.; Wexner,S.D.; Daniel,N.; DeMarta,D.; Weiss,E.G.; Nogueras,J.J.; Bernstein,M. (Dis Colon Rectum, 1997)