31.   But recent studies have found no link between the implants and serious diseases like lupus or rheumatoid arthritis, and many doctors believe they are safe.

32.   Cowboys doctors believe Haley has scar tissue in his back that is pressing on his sciatic nerve and causing him pain.

33.   Doctors believe Hodges has a rare degenerative brain ailment called Creutzfeldt-Jakob disease, otherwise known as Mad Cow Disease, which is always fatal.

34.   Doctors believe that players who completely recover from a concussion are not increasingly susceptible to subsequent ones.

35.   Doctors believe the trend is due in part to their own ability to make accurate diagnoses, and to greater acceptance of the disorder as an illness.

36.   Doctors believed it was a virus but were unable to offer a specific diagnosis.

37.   Doctors believed then that it was a virus that had ailed him.

38.   Doctors have long believed that the ozone in automobile pollution contributes to childhood asthma, a major and worsening problem.

39.   Doctors there initially believed he was suffering from heat exhaustion.

40.   Doctors believe that destroying a pea-sized area of the pallidus helps restore a balance by removing some of the hyperactive neurons, he said.