1. Adolescent Tdap Vaccine Use Among Primary Care Physicians
Amanda F. Dempsey, M.D., Ph.D., M.P.H., Anne E. Cowan, M.P.H., Karen R. Broder, M.D., Katrina Kretsinger, M.D., Shannon Stokley, M.P.H., Sarah J. Clark, M.P.H. 
Journal of Adolescent Health 
Volume 44, Issue 4, Pages (April 2009)
DOI: /j.jadohealth
Copyright © 2009 Society for Adolescent Medicine Terms and Conditions

2. Figure 1
Physician-identified barriers∗ to administering Tdap to adolescent patients in their practice among physicians who stock Tdap in their practice.
Journal of Adolescent Health  , DOI: ( /j.jadohealth )
Copyright © 2009 Society for Adolescent Medicine Terms and Conditions