Performing a surgical operation could be compared to na- gating inside the human body. Two essential requirements are necessary for a successful apprenticeship: ? A perfect understanding of the roadmap, the anatomy ? Regular training with expert surgeon teachers showing str- egies, tactics, manoeuvres, and gestures to make the journey safe, efficient and fast For decades this was the way taken by apprentice-surgeons and also by surgeons already in practice concerned about upd- ing their knowledge. For years their only travelling companions were books, drawings, and pictures. However, printed...