31.   AIDS doctors are rightly trying to dampen the initial hype and optimism over the treatment gains pending bigger and longer clinical trials.

32.   But she played little the rest of the year while doctors tried to diagnose her problem.

33.   But since many women are reluctant to seek help, doctors are trying to mobilize so that fewer women go undiagnosed.

34.   But when doctors try to use these numbers in conversations with actual patients, all scientific clarity seems to vanish and chaos and misunderstanding descend.

35.   But whenever doctors have tried to help a failing heart, the body has seemed determined to defeat them.

36.   But two doctors are trying to change that by making global warming relevant to the common man.

37.   But two Harvard doctors are trying to change that by making global warming relevant to the common man.

38.   Callanan said that doctors have tried using steroids or fat grafts to curb scarring -- with little success.

39.   Children, many maimed with machetes, scream in pain as the handful of nurses and doctors try to dress the wounds.

40.   Despite the improvement, doctors did not try increasing the dosage given at each dialysis treatment.