1. Tick-borne relapsing fever in the northwestern United States and southwestern Canada;Dworkin;Clin Infect Dis,1998
2. Tickborne relapsing fever—United States, 1990–2011;Forrester;MMWR Morb Mortal Wkly Rep,2015
3. Colorado reportable disease data,2015
4. Tickborne relapsing fever, Bitterroot Valley, Montana, USA;Christensen;Emerg Infect Dis,2015
5. Five cases of relapsing fever originating in Colorado with positive blood findings in two;Meador;Colo Med,1915