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<p>Update:</p>
<p>OK, I have replaced the dots (".") in the names with "_", now the order of the isolates is maintained. I'll have to keep in mind this behavior. I guess it's a bad idea to introduce special characters in my data in R.</p>
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<p>Sincerely,</p>
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<div style="font-family:Tahoma; font-size:13px">Massimiliano S. Tagliamonte</div>
<div style="font-family:Tahoma; font-size:13px">Graduate Student</div>
<div style="font-family:Tahoma; font-size:13px">University of Florida<br>
College of Veterinary Medicine</div>
<div style="font-family:Tahoma; font-size:13px">Department of Infectious Diseases and Pathology<br>
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