Adverse events and tolerability of combined durvalumab and tremelimumab versus durvalumab alone in solid cancers: a systematic review and meta-analysis by Fahmy, Omar, Ahmed, Osama A. A., Khairul-Asri, Mohd Ghani, Alhakamy, Nabil A., Alharbi, Waleed S., Fahmy, Usama A., El-Moselhy, Mohamed A., Fresta, Claudia G., Caruso, Giuseppe, Caraci, Filippo