Authors: Elpern, EH Okonek, MB Bacon, M Gerstung, C Skrzynski, M

Citation: Eh. Elpern et al., Effect of the Passy-Muir tracheostomy speaking valve on pulmonary aspiration in adults, HEART LUNG, 29(4), 2000, pp. 287-293

Authors: Elpern, EH Stevens, D Kesten, S

Citation: Eh. Elpern et al., Variability in performance of timed walk tests in pulmonary rehabilitationprograms, CHEST, 118(1), 2000, pp. 98-105