However, there is no guarantee that therapy will work even in this case.

It's not clear how well light therapy works at other times of the day.

You've needed help for months, and conventional therapy wasn't working.

But after five years, the office has yet to show that any alternative therapy works or does not work.

This therapy works to bring the constitution back into harmony.

The therapy only works, researchers said, if it is given six hours a day for at least two weeks.

If the conservative therapy doesn't work, then surgery can be an option.

Still, the therapy has been working, along with other treatment and the passage of time.

If most people think a therapy works, who wants to be the control?

It will be a year before the scientists can say whether the therapy worked.