Bayes Factors between different demographic models of HIV-1A and B in Albania.

1.Cost = costant population size; Expo = exponential population growth; BSP = Bayesian Skyline Plot; Strict = strict molecular clock; Relaxed = relaxed molecular clock.2.BF = Bayes Factor is the difference (in loge space) of the marginal likelihood of null (H0) and alternative (H1) model. BFs were estimated by comparing the approximate marginal likelihoods of different models given in Table S2. The standard error of the estimate is given in parenthesis.3.Evidence against H0 is assessed in the following way: 2>2 BF>6 indicates positive evidence against the null model; 6>2��BF>10 indicates strong evidence against the null model; 2��BF>10 indicates very strong evidence against the null model.