 and we compared those doses to work that had been done around Fukushima and Chernobyl. So we used that data then to be able to compare what we were doing and we reckon that our doses are about a tenth of what animals around Fukushima or Chernobyl are going to receive. And that falls well within current recommendations by the ICRP, the International Commission on Radiation Protection. How long does the radiation last for?