000 00313nam a2200121Ia 4500
008 251112s9999||||xx |||||||||||||| ||und||
040 _aCNCLSA
245 4 _aThe New England Journal Of Medicine
260 _c1997
_bMassachussets Medical Society
_aLondon
300 _aP.949-1936
300 _bV.337
942 _cJRBV
999 _c25075
_d25075