Dr. Kertz presented a program on Injury Prevention at Penn State University for the International Society of Bassists. The complete program is available for purchase here.
Here's a clip from the program...
Dr. Kertz is now a staff physician at Chicago Institute of Neurosurgery and Neuroresearch at the Neurologic and Orthopedic Hospital of Chicago. You can read his blogs there at http://neuro-ortho.org/blog/.
Check out Dr. Kertz's new bimonthly column on bassist's health and wellness, 'The Doctor Is In', at www.bass-musician-magazine.com.