Chang, V. T.; Tunkel, R. S.; Pattillo, B. A.; Lachmann, E. A. Journal of Pain and Symptom Management (1997)
Ku, A.; Henry, A.; Tunkel, R.; Lachmann, E.; Nagler, W. Archives of Physical Medicine and Rehabilitation (1996)
Henry, A. P.; Lachmann, E.; Tunkel, R. S.; Nagler, W. Archives of Physical Medicine and Rehabilitation (1996)