51.   Researchers are still studying how to best approach families overwhelmed by anguish.

52.   Researchers are studying a less invasive method.

53.   Researchers are studying the causes of bipolar disorder in children, and most agree this illness has a strong genetic basis.

54.   Researchers are studying whether their exposure to pesticides may be the cause.

55.   Researchers have studied use of virtual reality to help relieve the fear of heights and will soon study its use for the fear of flying, Rothbaum said.

56.   Since then, researchers have studied bonding, implants, and periodontal disease.

57.   Since strokes in humans result in a lack of oxygen to the brain, researchers now are studying ways of mimicking how turtles survive with little air.

58.   Some researchers are even studying the possibility of putting vaccines in fruits to make them more palatable for children, he said.

59.   Still other researchers are studying identical and fraternal twins to discover whether some people are genetically programmed to become forgetful with old age.

60.   The Aaron Diamond researchers studied two gay men who had engaged in high-risk sexual intercourse yet managed to avoid becoming infected with HIV.