1. Koch, R. Berliner Klin. Wochenschr. 19, 221–230 (1882).
2. Cole, S. T. et al. Nature 393, 537–544 (1998).
3. Sreevatsan, S. et al. Proc. Natl Acad. Sci. USA 94, 9869–9874 (1997).
4. Wayne, L. G. & Hayes, L. G. Infect. Immun. 64, 2062–2069 (1996).
5. Brennan, P. J. & Nikaido, H. Annu. Rev. Biochem. 64, 29–63 (1995).