“…In these models, one or more random effects (latent non-observed variables) are included to model the dependence between the observations. As an alternative for this approach, we could assume different existing multivariate or bivariate parametric lifetime distributions introduced in the literature where some parameters are related to the dependence structure between the lifetimes, see for example, [34], [9], [26], [4], [33], [18], [3], [19] and [41].…”