000 00258 a2200109 4500
005 20220511083336.0
022 _a1044 3983
245 _aEpidemiology journal
260 _aWashington
_bLippincott Williams & Wilkins
_c1993
490 _vVol. 4
942 _2lcc
_cCR
999 _c22265
_d22265