Proceedings of the National Academy of Sciences of the United States of America Proceedings of the National Academy of Sciences of the United States of America, 2001, 98 (24), pp.14144-14149. ⟨10.1073/pnas.241340898⟩ Proceedings of the National Academy of Sciences of the United States of America, National Academy of Sciences, 2001, 98 (24), pp.14144-14149. ⟨10.1073/pnas.241340898⟩