71.   Psychiatric researchers said the studies had valid purposes.

72.   Recent carefully controlled studies have more ambiguous results than expected.

73.   Scientists note also that the new study has its own biases.

74.   She said more study would have to be done before Cellucci could say conclusively that the bank could sustain oil and gas drilling.

75.   Study has national implications.

76.   Studies have yet to unearth any danger in consuming genetically modified plants.

77.   Studies will have to separate any risks of working at the plant from other risks, such as a lifetime of smoking.

78.   Studies have yet to be conducted to find out whether standardized patients produce doctors with better clinical skills and bedside manners.

79.   The cystic fibrosis study had its origins in laboratory experiments indicating that it might be possible to cure the disease.