TY - RPRT TI - Comparative study between intra-anal sponge and needle electrode for electromyographic evaluation of constipated patients. AU - J Pfeifer AU - T A Teoh AU - V D Salanga AU - F Agachan AU - S D Wexner PY - 1998 DO - 10.1007/bf02239438 UR - https://pubmed.ncbi.nlm.nih.gov/9749500/ ID - 9749500 ER -