41.   Experts have long cautioned against determining penalties or rewards on the basis of test scores in any single year.

42.   Experts also cautioned that the lack of a convincing theoretical explanation makes the results somewhat suspect.

43.   Experts caution against using antibiotics, which may do more harm than good.

44.   Experts caution that patients using herbs should discuss them with their doctors.

45.   Experts caution that the new office does not mean that law and order are unraveling on the high plains.

46.   Experts caution that there is no standard modus operandi for an eco-terrorist.

47.   Experts caution, however, that any such treatment remains a distant prospect.

48.   Experts caution that any attempt to put firm costs on this buildup is fruitless because the price tag rises daily.

49.   Experts caution that the technique is still highly experimental and not likely to be widely adopted until more testing is done.

50.   Experts cautioned on Wednesday that a sliding economy could undo some of the population gains, especially since several intractable problems still plague Chicago.