<affiliation wicri:level="2"><nlm:affiliation>Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892, USA. Electronic address: urvtiin@mail.nih.gov.</nlm:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD 20892</wicri:regionArea>
<placeName><region type="state">Maryland</region>
</placeName>
</affiliation>