Emerging Infectious Diseases * Volume 2 * Number 2            April-June 1996

Invasive Penicillin-Resistant Pneumococcal Infections:
A Prevalence and Historical Cohort Study

Crystal B. Kronenberger, M.D., M.S.P.H.,* Richard E. Hoffman, M.D., M.P.H.,^† Dennis C. Lezotte, Ph.D.,* and William M. Marine, M.D., M.P.H.*

*Department of Preventive Medicine and Biometrics, University of Colorado Health Sciences Center, Denver, Colorado, USA; ^†Colorado Department of Public Health and Environment, Denver, Colorado, USA