00385    a2200133   4500020001800000082001500018100002400033245006200057260004800119300001900167650001700186650002900203700001900232  a9780195150780  a614.4bKOE  aKoepsell, Thomas D.  aEpidemiologic methodsbstudying the occurrence of illness  aOxfordbOxford university pressc2003g2003  aix,513p.c24cm  aEpidemiology  aEpidemiological methods   aWeiss, Noel S.