As a result of the study, eleven species of mangrove have been placed on the Red List of Threatened Species.

VOA: special.2010.04.20

More detailed results of the study are expected to be presented at an AIDS vaccine conference in Paris next month.

VOA: special.2009.09.30

The writers of the study have called for stronger rules requiring cattle to be treated before being sold at market.

VOA: special.2010.01.04

More detailed results of the study are expected to be presented at a conference in France later this month.

VOA: special.2009.10.13

Ellen Yeh from the Stanford University School of Medicine in California was one of the authors of the study.

VOA: special.2009.08.03

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

VOA: special.2009.09.16

But one of the authors of the study, Tim McClanahan from the Wildlife Conservation Society, says fisheries in Africa face another threat.

VOA: special.2009.08.11

Both of the researchers who taught the class, Ms.Schelew and Louis Deslauriers, were also authors of the study.

VOA: special.2011.06.02

As part of the study, the young men and women were asked how many hours of television or videos they watched daily.

VOA: special.2009.03.10

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

VOA: special.2010.02.17

Dr.Armando Giuiliano at the John Wayne Cancer Institute in Santa Monica,California, was a leader of the study.

VOA: special.2011.03.23

The results of the study were reported last month in the Journal of the American Medical Association.

VOA: special.2009.03.10

Cheryl Richardson also points to one of the study's findings that injuries are often the result of contact with a person or a structure.

VOA: special.2009.08.06

Thomas Wang at the Mass General Heart Center was the senior author of the study.

VOA: special.2009.07.15