“…Twenty-seven studies were retrospective non-randomized,52–57,60,62,63,65–70,72,73,75,76,78,79,81–84,86,87 eight studies were prospective non-randomized58,59,61,64,71,74,77,85 and one study was prospective randomized 80. Twelve studies were from the USA,52,56,58,64,66,67,69,70,74,75,79,87 one from the UK,78 one from Germany,85 three from France,61,80,82 one from Belgium,53 three from Italy,62,71,81 one from Norway,68 two from Sweden,57,86 one from Switzerland,59 three from Australia,60,77,88 one from Canada,73 three from South Korea,65,83,84 one from Taiwan,76 one from Thailand54 and one from Venezuela,72 while one study was multinational 63. Thirteen articles compared robotic with laparoscopic operations,53,54,63,65,67,68,71,76,79–81,84,87 19 articles compared robotic with open procedures,52,55–59,61,62,66<...>…”