21.   And mussels contributed to a valve problem last October at the Nine Mile nuclear power plant on Lake Ontario, Niagara Mohawk Power Corp. said.

22.   But the settlement only applied to patients with possible heart valve problems.

23.   Experts also say the latest evidence hints that the valve problems may gradually go away after people stop taking the drugs.

24.   Her heart valve problems were diagnosed a year later.

25.   The company announced a nationwide deal last week to settle claims that the drug combination caused dangerous heart valve problems.

26.   The study found no evidence that the patients who developed valve problems got worse.

27.   The tank belatedly opened in December, one month after three sharks died when a valve problem released too much ozone into the water.

28.   The second drug in Redux, phentermine, was not linked to heart valve problems.

29.   Three studies published last fall, including a Mayo Clinic report, suggested that in some cases the valve problems disappeared after patients stopped taking the drugs.