Characteristics of Medicare Part D beneficiaries who reach the drug benefit threshold in both of the first two years of the Part D benefit.
Bayliss EA, Ellis JL, Delate T, Steiner JF, Raebel MA. Characteristics of Medicare Part D beneficiaries who reach the drug benefit threshold in both of the first two years of the Part D benefit. Med Care. 2010 Mar; 48(3):267-72.