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Tyrrell, Gregory J., Marguerite Lovgren, Betty Forwick, Nancy P. Hoe, James M. Musser, and James A. Talbot. M Types of Group A Streptococcal Isolates Submitted to the National Centre for Streptococcus (Canada) From 1993 to 1999. American Society for Microbiology (ASM), 2002.

Tyrrell, Gregory J., et al. M Types of Group A Streptococcal Isolates Submitted to the National Centre for Streptococcus (Canada) From 1993 to 1999. American Society for Microbiology (ASM), 2002.