some epidemiological evaluations of the relationship between lung cancer and exposure to radon daughters , i.e . residency in stone houses versus wooden houses ( with and without consideration of the contribution of radon from the ground underneath the houses ) , seem to indicate a risk also to the general population and , moreover , the risk of smoking seems to be several times greater in stone houses than in wooden houses , the latter usually having less radon daughters on the average .
C0034629
radon
C0072962
radon daughters