Invasive Methicillin-Resistant Staphylococcus aureus USA500 Strains from the U.S. Emerging Infections Program Constitute Three Geographically Distinct Lineages. - Frisch MB; Castillo-Ramírez S; Petit RA 3rd; Farley MM; Ray SM; Albrecht VS; Limbago BM; Hernandez J; See I; Satola SW; Read TD (MSphere, 2018)