Supplementary Video 2: After modelling the titanium bars to the best fitting shape following the template, they were fixed to the allograft and rib stumps with locking screws. A drill was used to making the holes for the screws. In case of partial sternectomy, the allograft was fixed to the recipient sternum with an H-shaped or star-shaped titanium plate. The allograft was then covered with a major advancement pectoralis muscle flap, that it was prepared at the beginning of the surgical procedure.