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He was not involved in the selection of peer reviewers nor in any editorial decisions related to this manuscript. Irene Rivera-Ruiz, Jes\u00fas Gay-Mimbrera, Pedro J. G\u00f3mez-Arias, Macarena Aguilar-Luque, Miguel Juan-Cencerrado, Carmen Moch\u00f3n-Jim\u00e9nez, Esmeralda Parra-Peralbo, Beatriz Isla-Tejera, and Francisco G\u00f3mez-Garc\u00eda have nothing to disclose.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of Interest"}},{"value":"This meta-analysis was conducted in accordance with established guidelines for ethical research. This meta-analysis did not involve the collection of new data from human or animal participants. Instead, it utilized data from previously published studies, all of which had obtained appropriate ethical approvals from their respective institutional review boards or ethics committees. 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