Investigation of Descriptive Characteristics of Randomized Controlled Trials of COVID-19 Vaccines oleh Elif Köse, Hasan Çetin Ekerbiçer, Alper Arslan, Arman Özaygın, Betül Nas, Beyza Yavuz, Büşranur Metin, Elif Şahin, Emine Nuran Keske, Hande Çelik, Kadir Özkan, Melike Kutlu, Merve Ayral, Merve Erdoğan, Neslihan Kılıç, Nilay Nur Önder, Özge Arıcı, Özge Bölükbaşoğlu, Elif Şahin, Sadeq Albishari, Gökhan Oturak