RETRACTED: Evaluation of simultaneous surgical operations in obesity patients Dmitriy Galimov, Oleg Galimov, Vladislav Khanov, Rinat Sufiyarov, Tel’man Ibragimov and Gul’naz Vagizova E3S Web Conf., 420 (2023) 05006 Published online: 04 September 2023 DOI: 10.1051/e3sconf/202342005006