The comparison of quantitative variables means will be done by student´s t-test in case of normality or by nonparametric tests in the opposite case. Categorical variables will be analyzed by the Chi square test. Survival will be analyzed by Kaplan-Meier curves. The comparison between pre and post PROGALIAM curves will be done by a log-rank test. A p <0.05 will be considered statistically significant for two-tailed tests.