Epidural Spinal Stimulation to Improve Bladder, Bowel, and Sexual Function in Individuals With Spinal Cord Injuries: A Framework for Clinical Research. - Roderic I. Pettigrew; William J. Heetderks; Christine A. Kelley; Grace C. Y. Peng; Steven H. Krosnick; Lyn B. Jakeman; Katharine D. Egan; Michael Marge (IEEE Trans. Biomed. Eng., 2017)