(HealthDay News) -- Here are the latest clinical trials, courtesy of Thomson CenterWatch:
Vaccines
If you are 70 years or older and have documented vaccination with one dose of 23vPS (Pneumovax) at least five years before trial enrollment, you qualify for this study.
The research site is in Fargo, N.D.
More information
Please see http://www.centerwatch.com/patient/studies/cat372.html 
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Sleep Disorders
If you are aged 18-64 and are frequently feeling tired, sluggish or unrefreshed throughout the day, you may qualify for this study.
The research site is in Raleigh, N.C.
More information
Please see http://www.centerwatch.com/patient/studies/cat169.html .
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Lower Back Pain
If you are aged 18 to 65 and have a history of low back pain with no major orthopedic injury, you may qualify for this study.
The research site is in Lexington, Ky.
More information
Please see http://www.centerwatch.com/patient/studies/cat700.html .
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