Addition of transcutaneous electrical nerve stimulation to therapeutic exercise and activities of daily living does not enhance the development of quadriceps strength and voluntary activation: a randomized controlled trial. (April 2019) - Pietrosimone, B.; Luc-Harkey, B.A.; Harkey, M.S.; Davis-Wilson, H.C.; Pfeiffer, S.J.; Schwartz, T.A.; Nissman, D.; Padua, D.A.; Olmos, P.; Spang, J.; Blackburn, J.T.