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a Center for Minimally Invasive Surgery, Hospital Neuwerk, Mönchengladbach , Germany; b Department of General Surgery, University Hospital of Heraklion, and c Department of Social Medicine, Biostatistics Laboratory, Faculty of Medicine, University of Crete, Crete , Greece; d Liverpool Vascular and Endovascular Service, Royal Liverpool University Hospital, Liverpool , UK; e Department of General Surgery, Sisters of Charity Hospital, Linz , and

Lack of Improvement Over Time in Methodological Quality of Randomized Trials on Laparoscopic Surgery Training