000 00278nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aBritish Medical Jounral
260 _aLondon
_bBMJ Publishing Group Ltd
_c1 Jul-31 Jul,2002
362 _a323-323
_b7354-7357
942 _2ddc
_cJ
999 _c191768
_d191768