000 00296nam a2200133Ia 4500
008 200512s9999 xx 000 0 und d
082 _a614.5
100 _aFletcher
245 0 _aClinical epidemiology the essentials
250 _a4
260 _bLww
_c-
440 _v_
650 _aepidemiology
999 _c50689
_d50689