Protocol of internal exposure of uranium and fluoride in mice C57Bl6. Scale of time is given at the top of the figure (in days). Day 4 before injection mice are put 24 hours in metabolism cages to collect urines, at day 0 mice are injected intraperitoneally with either uranium or fluoride and directly put in metabolism cages again. Day 2 or day 3 after injection mice are euthanized to extract kidneys.