OMICS is widely regarded as a predatory publisher.[3][4][5][6][7][8] It has been subject to widespread criticism, notably by Jeffrey Beall, who included OMICS in his list of "potential, possible, or probable predatory" publishers. Among the criticism leveled at OMICS are that its journals are not actually peer-reviewed as advertised, often contain mistakes, and that its fees are excessive.[7] OMICS says that its activities are legitimate and ethical, and that the quality of its editorial control does need improvement.[4][8] Other criticisms of OMICS include the publication of pseudoscientific articles,[4] deceptive marketing practices,[13][7] targeting of young investigators or those in lower income regions,[7][8] and holding papers hostage by disallowing their withdrawal (preventing them from being published by other journals).[9][24]