But recent findings have suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.08.12

But his most effective way to spread his anti-violence message is through radio.

VOA: special.2010.08.26

But it has been effective. It has helped to balance a potentially disruptive tension between the desires of a minority and the broader interests of our all-volunteer force."

VOA: special.2010.02.06

But this increased attention does not mean anything without effective action.

VOA: special.2009.05.08

it says, " but rather more effective regulation."

VOA: special.2009.06.19

The visa for James Elder, an Australian,has been canceled effective Monday, but officials say after an appeal from the United Nations he will be allowed to stay there under September 21.

VOA: standard.2009.09.06

Some fire chiefs in California say that residents should always be encouraged to evacuate, but Naomi Brown, from the Australasian Fire and Emergency Service Authorities Council, says installing effective early warning systems is the key.

VOA: standard.2009.06.24

"What we assure is that the technologies that do come on the market are safe and effective, but whether or not they should be used on a given case,a given patient, is a decision that is made by the individual practitioner."

VOA: standard.2010.04.07

"Since that time we've really learned that as close as they are to human species, they're not close enough for any real scientific outcomes for drug testing.I think like that" That's Elizabeth Kucinich, wife of U.S. Congressman Dennis Kucinich, she is a long-time animal welfare advocate and serves as director of public affairs, for the Physicians Committee "Over 80 different HIV-related vaccines have worked in chimpanzees but none have proven effective in human beings.

VOA: standard.2010.02.16