Sharma, A., Liu, B., Waudby, P., & Duthie, G. S. (2011). Sacral neuromodulation for the management of severe constipation: development of a constipation treatment protocol. INTERNATIONAL JOURNAL OF COLORECTAL DISEASE, 26(12), (1583-1587). doi:10.1007/s00384-011-1257-x. ISSN 0179-1958