Group A Streptococcal (GAS) Disease. Centers for Disease Control and Prevention. U.S. Department of Health & Human Services. [21 November 2012]. (原始内容存档于2019-11-13).
Group A Streptococcal (GAS) Disease. Centers for Disease Control and Prevention. U.S. Department of Health & Human Services. [21 November 2012]. (原始内容存档于2019-11-13).