000 00293nam a2200097Ia 4500
008 220809s1991 xx 000 0 und d
041 _aeng
245 _aBritish Medical Journal Vol.303, No.6810-6816, Nov-Dec 1991
260 _aLondon
_bBristish Medical Association
_c1991
520 _aBack Volume
999 _c159042
_d159042