"Many factors contributed to the decline", said Patrick McIntyre, an ecologist who was the lead author of the study.

该研究的领头作者、生态学家帕特里克·麦克伦泰尔表示：“许多因素导致了这种下降。”

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Nora Volkow is director of the National Institute on Drug Abuse and the lead author of the study.

VOA: special.2009.09.16

Doctor David Wilber at Loyola University Medical Center in Illinois was the lead author of the study.

VOA: special.2010.02.17

Brian Primack at the University of Pittsburgh medical school was the lead author of the new study.

VOA: special.2009.02.11

This propelled him to co-author a study in 1998.

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But it's not clear if the performance lapses seen in the study would be meaningful in real-world operating rooms, says surgeon Emily Boyle, the lead author of the study and a researcher at the Royal College of Surgeons, in Dublin, Ireland.

CNN: Surgeons' 'bottle-to-scalpel' time affects errors

The author of this study says that it shows that we're still very deep in this housing correction.

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