(HealthDay News) -- Here are the latest clinical trials, courtesy of Thomson CenterWatch:
Asthma
If you are age 12 or older and have asthma, you may qualify to participate in this study.
The research site is in Houston, Texas.
More information
Please see http://www.centerwatch.com/patient/studies/cat16.html 
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Healthy Patient Studies
If you have a minimum of five years experience as a long-haul truck driver; are able to speak, read, and write English; and have refused to accept work assignments when you felt too tired to do so safely, you may qualify for this study.
The research site is in Lexington, Ky.
More information
Please see http://www.centerwatch.com/patient/studies/phasei.html .
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Lower Back Pain
If you are 18 to 75 years old, diagnosed with chronic or severe lower back pain, and have required daily opioid pain medication for the condition for at least two months, you may be eligible for this study.
The research site is in Englewood, N.J.
More information
Please see http://www.centerwatch.com/patient/studies/cat700.html .
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