Retraction: Abdallah MS, Mosalam EM, Hassan A, et al. Pentoxifylline as an adjunctive in treatment of negative symptoms in chronic schizophrenia: A double-blind, randomized, placebo-controlled trial. CNS Neurosci. Ther. 2023;29:354-364 (https://doi.org/10.1111/cns.14010).

Retraction: Abdallah MS, Ramadan AN, Omara-Reda H, et al. Double-blind, randomized, placebo-controlled pilot study of the phosphodiesterase-3 inhibitor cilostazol as an adjunctive to antidepressants in patients with major depressive disorder. CNS Neurosci. Ther. 2021;27:1540-1548 (https://doi.org/10.1111/cns.13731) The above article, published online on September 21, 2021 in Wiley Online Library (wileyonlinelibrary.com) has been retracted by agreement between the journal's Editor-in-Chief, Xiaoming Hu, and John Wiley and Sons Ltd. Following publication, multiple concerns were raised by a third party about the integrity of the clinical trial. An investigation revealed significant issues regarding the reliability of the reported data. As a result, the Editor-in-Chief no longer has confidence in the validity of the results presented in this article.