Virtual reality simulator versus box-trainer to teach minimally invasive procedures: a meta-analysis - Guedes, Hugo Goncalo; Ferreira, Zemia Maria Camara Costa; Leao, Layra Ribeiro de Sousa; Montero, Edna Frasson Souza; Otoch, Jose Pinhata; Artifon, Everson Luiz de Almeida (International journal of surgery, 2019)