000 00342nam a2200109Ia 4500
008 160509s9999 xx 000 0 und d
100 _aBritish Medical Journal
245 _aBritish Medical Journal : 1990 : Volume 301(6742-6753) : Shelf 4.7
260 _bBritish Medical Association
_c1990
300 _a679p.+
650 _aBritish Medical Journal
999 _c4916
_d4916