Text this: Susceptibility Testing for the Polymyxins: Two Steps Back, Three Steps Forward?

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| '--' || | || | || / //---`'  / //\ \\ / //---`' 
| .--. || | \\_/ || \ \\___   |  ___  ||\ \\___   
|_|| |_||  \____//   \_____|| |_||  |_|| \_____|| 
`-`  `-`    `---`     `----`  `-`   `-`   `----`