(HealthDay News) -- Here are the latest clinical trials, courtesy of CenterWatch:

Sarcoma

If you have gastrointestinal stromal tumors (GIST) that are not controlled by available standard therapy, you may qualify for this study.

The research site is in Duarte, Calif.

More information

Please see http://www.centerwatch.com/patient/studies/cat134.html.

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Surgery

If you are an adult with severe mitral valve leakage who is scheduled for open heart surgery, you may be eligible for this study.

The research site is in Charlottesville, Va.

More information

Please see http://www.centerwatch.com/patient/studies/cat614.html.

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Lower Back Pain

If you are 18 or older, have had low back pain for more than three months that is not directly related to previous surgery, are able to have a MRI, and are able to make several visits to the sponsoring clinic, you may qualify for this study.

The research site is in Boston, Mass.

More information

Please see http://www.centerwatch.com/patient/studies/cat700.html.

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