000 00278nam a2200121Ia 4500
003 LDD
040 _cLDD
041 _aen
245 0 _aBritish Medical Jounral
260 _aLondon
_bBMJ Publishing Group Ltd
_c1 Jan-28 Feb,1999
362 _a318-318
_b7175-7183
942 _2ddc
_cJ
999 _c191723
_d191723