(HealthDay News) -- Here are the latest clinical trials, courtesy of Thomson CenterWatch:
Lower Back Pain
If you are 18 or older and have had persistent lower back pain for three months or longer, you may qualify for this study.
The research site is in Toledo, Ohio.
More information
Please see http://www.centerwatch.com/patient/studies/cat700.html 
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Osteoarthritis
If you are 40 or older, have been diagnosed with osteoarthritis of the knee or hip, and you have been treated for high blood pressure, you may qualify for this study.
The research site is in Clarksville, Tenn.
More information
Please see http://www.centerwatch.com/patient/studies/cat109.html .
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Alzheimer's Disease
If you aged 50 to 88 and have been diagnosed with probable Alzheimer's disease, you may qualify for this study.
The research site is in Phoenix, Ariz.
More information
Please see http://www.centerwatch.com/patient/studies/cat11.html .
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