Key points are not available for this paper at this time.
From the Department of Microbiology and Immunology, University of Rochester Medical Center, Elmwood Pediatric Group, Rochester, NY (MEP), and CHI Créteil, Service de Microbiologie, Créteil France (RC). Accepted for publication April 17, 1997. Reprints not available.
Pichichero et al. (Tue,) studied this question.