TY - CHAP T1 - Lactulose versus Polyethylene Glycol for Chronic Constipation UR - https://doi.org/10.1002/14651858.cd007570 PY - 2009/01/21 AU - Lee-Robichaud H AU - Thomas K AU - Morgan J AU - Nelson RL ED - Lee-Robichaud H DO - DOI: 10.1002/14651858.cd007570 PB - John Wiley & Sons, Ltd Y2 - 2025/12/21 ER -