000 00227nam a2200085Ia 4500
245 _aNature : Vol 427, Nos 6969-6972, 2004
260 _bMacmillan, London, Lindin, U.K.
082 _aAm561,M66 P05.427/V25331
300 _app 1-378
999 _c41885
_d41885