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What percentage of the participants had come from prison anger management?

What percentage of the participants had completed anger management?

What percentage of the participants had undergone anger management but not completed it?

Who were the control group in Howells study?

Who was given the session checklist in Howells' study?

In Howells' study, what did the databases check for?

What was Howell's conclusion to the study?

In Howells' study, was there much improvement over the following 6 months?