Direct-to-consumer marketing [4] (multiple letters)

Sarah K. Weinberg, David Ackman, Sherry Glied, José Pedro L. Nunes, J. Willis Hurst, James E. Ehrlich, John A. Rumberger, Alan G. Wasserman, Meredith Rosenthal, Richard G. Frank, Arnold M. Epstein, Thomas H. Lee, Troyen A. Brennan, Sidney M. Wolfe