**Contents**


**Adam Sybilski, Małgorzata Sobolewska-Pilarczyk, Urszula Dryja, Ewa Majda-Stanisławska, Sławomira Niedzwiecka, Ernest Kuchar, Bolesław Kalicki, Anna Gorczyca and Magdalena ´ Marczy ´nska**

Clinical and Epidemiological Characteristics of 1283 Pediatric Patients with Coronavirus Disease 2019 during the First and Second Waves of the Pandemic—Results of the Pediatric Part of a Multicenter Polish Register SARSTer

Reprinted from: *J. Clin. Med.* **2021**, *10*, 5098, doi:10.3390/jcm10215098 ................ **55**


Reprinted from: *J. Clin. Med.* **2021**, *10*, 1583, doi:10.3390/jcm11154472 ................ **139**

#### **Alberto Enrico Maraolo, Anna Crispo, Michela Piezzo, Piergiacomo Di Gennaro, Maria Grazia Vitale, Domenico Mallardo, Luigi Ametrano, Egidio Celentano, Arturo Cuomo, Paolo A. Ascierto and Marco Cascella**

The Use of Tocilizumab in Patients with COVID-19: A Systematic Review, Meta-Analysis and Trial Sequential Analysis of Randomized Controlled Studies Reprinted from: *J. Clin. Med.* **2021**, *10*, 4935, doi:10.3390/jcm10214935 ................ **153**

#### **Paweł Jemioło, Dawid Storman and Patryk Orzechowski**

