Source: https://www.researchgate.net/profile/Adama-Sanou/publication/258514246_LA_CHOLECYSTECTOMIE_LAPAROSCOPIQUE_AU_BURKINA_FASO_A_PROPOS_DE_32_CAS_PATIENTS_ET_METHODE/links/00b49528776bf4f9be000000/LA-CHOLECYSTECTOMIE-LAPAROSCOPIQUE-AU-BURKINA-FASO-A-PROPOS-DE-32-CAS-PATIENTS-ET-METHODE.pdf