"It is crucial that national authorities do not rush to give information on source of infection which is not proven by bacteriological analysis, as this spreads unjustified fears in the population all over Europe, and creates problems for our food producers selling products in the EU and outside of the EU."

VOA: special.2011.06.10

Costello says she expects more studies as DNA analysis gets cheaper and faster.

VOA: standard.2010.06.30

Baek Seung-joo, at Seoul's Korea Institute on Defense Analysis, says he thinks North Korea will discuss what he describes as "fundamental nuclear issues" only with the United States, not China.

VOA: standard.2009.10.05