Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) NAKAGAWA Kunitoshi,Conversion to Laparotomy during Laparoscopic Cholecystectomy,Nihon Gekakei Rengo Gakkaishi (Journal of Japanese College of Surgeons),0385-7883,Japanese College of Surgeons,2003,28,4,715-718,https://cir.nii.ac.jp/crid/1390282679326391808,https://doi.org/10.4030/jjcs1979.28.4_715