Key points are not available for this paper at this time.
From the Department of Pediatrics, World Health Organization Collaborating Center for Reference and Research on Streptococci, University of Minnesota Medical School, Minneapolis, MN. Accepted for publication Feb. 1, 2002. AS is a medical fellow; ELK is a professor of pediatrics. The authors have disclosed that they have no significant relationships with or financial interest in any commercial companies that pertain to this educational activity. Reprints not available. Chief Editors' Note: This is the second of four articles published in 2002 for which a total of up to 4 Category I CME credit hours can be earned. Instructions for how credit hours can be earned appear at the end of the Table of Contents. The CME activity contained within this series is supported by an unrestricted educational grant from Roche Laboratories. Honoraria are provided to authors of all articles.
Shet et al. (Wed,) studied this question.