Medigap preferred provider organizations: Issues, implications, and early experience

por Nelson, Lyle, Swearingen, Gary, Sing, Merrile, Quinn, Elizabeth
Publicado 1991

Reconciling Medical Expenditure Estimates from the MEPS and NHEA, 2002

por Sing, Merrile, Banthin, Jessica S., Selden, Thomas M., Cowan, Cathy A., Keehan, Sean P.
Publicado 2006