mtvc                    (mtvc) Multiple Time Varying Covariates
simwide                 This data frame contains variables that are
                        time varying, which might change at a specific
                        time point. In particular, are referred to
                        Graft Versus Host Disease, both Acute and
                        Chronic, and relapse, which is the recurrence
                        of the disease. In addition, this data frame
                        contains specific dates, that refer to the
                        first and last visit of the patient, and the
                        respective dates of each time varying variable,
                        day from which that factor will change its
                        value.
