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Given a text, write a compressed version of it in a single sentence.

Most of the interventions described previously were conducted by specialists trained in alcohol or substance abuse counseling or in motivational interviewing techniques. These interventionists met with the patient, discussed drinking and substance use openly and directly, and offered some advice and assistance.
Output:
Most of the interventions described previously were conducted by specialists trained in alcohol or substance abuse counseling or in motivational interviewing techniques.