000 00270naa a2200097ua 4500
008 170510s2008 xxu||||| |||| 00| 0 eng d
245 _aNEJM: The New England Journal of Medicine
260 _bMassanchusetts Medical Society
_c2008
300 _a2313-2854
650 _aMedicine
999 _c4555
_d4555