Long-term efficacy, safety and tolerability of low daily doses of isoosmotic polyethylene glycol electrolyte balanced solution (PMF-100) in the treatment of functional chronic constipation. - Corazziari,E.; Badiali,D.; Bazzochi,G.; Basotti,G.; Roselli,P.; Mastropaolo,G.; Luca,M.G.; Galeazzi,R.; Peruzzi,E. (Gut, 2000)