Sheth AN, Wiersma P, Atrubin D, Dubey V, Zink D, Skinner G, Doerr F, Juliao P, Gonzalez G, Burnett C, Drenzek C, Shuler C, Austin J, Ellis A, Maslanka S, Sobel J. International outbreak of severe botulism with prolonged toxemia caused by commercial carrot juice. Clin Infect Dis. 2008 Nov 15;47(10):1245-51. doi: 10.1086/592574.