41.   Doctors are trying to determine the cause of the bleeding, which has stopped.

42.   Doctors have tried a variety of hormones.

43.   Doctors themselves may try to dilute their responsibility.

44.   Doctors tried a special instrument to force oxygen through her lungs, to no avail.

45.   Doctors tried medication when Olajuwon went to the hospital Tuesday night, but it did not control the abnormal heart rhythm.

46.   Doctors have tried for at least three decades to use animal parts as replacements for failing human organs.

47.   Doctors have tried to manipulate the chip out of the elbow, and when that happens, Hundley figures he will play again.

48.   Doctors often try to direct, but only sometimes is their advice followed.

49.   Doctors tried HIV drugs on her.

50.   Doctors tried to figure out which of the various symptoms and findings really were part of the new syndrome.