"If by December, there is not an in-depth change by the Iranian leaders, sanctions will have to be taken,".

VOA: standard.2009.09.25

While he acknowledges that there is much to be learned from alternative research methods like cell culture a process by which cells are taken from a living organism and grown under controlled conditions VandeBerg says they have learned a lot more from research on chimpanzees.

VOA: standard.2010.02.16