21.   But cholesterol-lowering studies were disappointing, in part, researchers said, was because reducing cholesterol levels was very difficult.

22.   But even as new drugs trickled onto the market, interest in the ketogenic diet never completely waned at Johns Hopkins, says researcher Freeman.

23.   But it does mean that more education is needed to alert both patients and doctors not to exceed the recommended doses, said the researcher, Dr. William Lee.

24.   But it was the lighter beers, not the dark beer higher in antioxidants, that worked best against atherosclerosis, researchers said.

25.   But that could be a long time, the researchers said.

26.   Cesarean babies may be more susceptible to schizophrenia than children born naturally, say Canadian researchers who studied the effects of the operation on rats.

27.   Cinnamon may prevent or at least delay a type of diabetes that develops with age, say researchers in the United States.

28.   Couples come to see parenthood as an exciting joint project on which to focus, say researchers.

29.   Definitive answers may take at least three more years, the researchers said Thursday.

30.   Doctors often assume patients wish to avoid developing cancer and do not mind the cost or invasiveness of the tests involved, researchers said.