000 00278nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aBritish Medical Jounral
260 _aLondon
_bBMJ Publishing Group Ltd
_c1 Oct-31 Oct,2000
362 _a321-321
_b7265-7268
942 _2ddc
_cJ
999 _c191767
_d191767