Improving influenza and pneumococcal immunizations in Oklahoma: preliminary results of a survey of Medicare beneficiaries.
Oehlert WH, Natt S, Nguyen L, Murray C, Nsa W, Bratzler DW. Improving influenza and pneumococcal immunizations in Oklahoma: preliminary results of a survey of Medicare beneficiaries. J Okla State Med Assoc. 2001 Oct; 94(10):461-8.