“…For the same surgical procedure, there are large variations between countries and among hospitals in the same country [ 5 , 11 , 12 ]. Day surgery is not yet a common practice in many developed countries, with France [ 1 , 10 , 13 , 14 ], Italy [ 1 , 15 ], and Switzerland [ 16 , 17 ], suggesting a large potential for growth.…”