TY - JOUR A1 - Holford, T.R. T1 - Understanding the effects of age, period, and cohort on incidence and mortality rates Y1 - 1991 DO - 10.1146/annurev.pu.12.050191.002233 UR - https://doi.org/doi:10.1146/annurev.pu.12.050191.002233 VL - 12 ER -