1 CEPN (Nuclear Protection Evaluation Centre), 28 Rue de la Redoute, 92260 Fontenay-aux-Roses, France. Electronic address: thierry.schneider@cepn.asso.fr.
2 Centre for Environmental Radioactivity (CERAD), NMBU, Ås, Norway.
3 Barcelona Institute for Global Health (ISGlobal), Barcelona, Spain; Pompeu Fabra University, Barcelona, Spain; Spanish Consortium for Research and Public Health (CIBERESP), Instituto de Salud Carlos III, Madrid, Spain.