21.   But in this case, the doctors did not think it would work.

22.   But myelodysplasia can lead to leukemia, a cancer of blood cells, and many doctors think of the condition as a precursor of leukemia.

23.   But Reisberg had just started a job at New England Medical Center in Boston, where he was developing a computer model on how doctors think.

24.   But some traditional doctors think the bridging of gaps has gone too far by holding alternative medicine to less rigorous scientific standards than conventional care.

25.   But the study suggests they may in fact work more effectively on women than doctors have thought.

26.   Chassin said some doctors elsewhere thought the case had little relevance to them.

27.   Church had much abdominal pain in the first few weeks of his recovery, but doctors thought it was a normal after-effect of his surgery.

28.   Circumcision is widespread in this country because doctors have long thought that it prevented sexually transmitted disease, but the researchers found no evidence for that.

29.   Doctors first thought he had Charcot-Marie Tooth, a neurological disease.

30.   Doctors first thought Holyfield went the distance with Michael Moorer in virtual cardiac arrest, but later decided he was just dehydrated.