Funding for this research was provided by:
Received: 9 April 2020
Accepted: 9 June 2020
First Online: 18 June 2020
Compliance with ethical standards
: Dr Alessio Pigazzi received research support from Novadaq, Inc and is a consultant for Intuitive Surgical. Alberto Arezzo, Marco Augusto Bonino, Frédéric Ris, Luigi Boni, Elisa Cassinotti, Dominic Chi Chung Foo, Nga Fan Shum, Alberto Brolese, Francesco Ciarleglio, Deborah S Keller, Riccardo Rosati, Paola De Nardi, Ugo Elmore, Uberto Fumagalli, Mehraneh Dorna Jafari, Evgeny Rybakov, Mikhail Alekseev, Jun Watanabe, Nereo Vettoretto, Roberto Cirocchi, Roberto Passera, Mario Morino declare that they have no conflict of interest.
: Ethical approval is not needed as this study corresponds to a meta-analysis of studies already published.
: Informed consent is not needed as this study corresponds to a meta-analysis of studies already published.