Estimated fitness costs for ZDV mutants.

<p>Estimated resistance factors (on a logarithmic scale, log RF, column 2) and fitness costs (column 3) of TAM-1 and TAM-2 mutants and two mixed mutants arising during ZDV therapy. In parentheses, are the 95% confidence intervals for the estimates obtained from 200 bootstrap samples (where we resampled with replacement from the list of statistical waiting times and re-estimated fitness costs).</p><p>Estimated fitness costs for ZDV mutants.