PCR test for SARS-CoV-2 persistently positive. Virus detection is not always COVID-19 Carlos Herrero Hernando; Javier Amadeo Álvarez Serra; María José Elizari Saco; Silvia Martínez-Nadal; Clara Vila Cerén;

Consequences of COVID-19 pandemic over acute bronchiolitis hospitalizations in the center and east of Spain Juan Manuel Rius-Peris; Jesús Lucas-García; Mónica García-Peris; Pascual Escrivá Tomás; José Miguel Sequí-Canet; Javier González de Dios;

COVID-19: Critical appraisal of the evidence Paz González Rodríguez; Begoña Pérez-Moneo Agapito; María Salomé Albi Rodríguez; Pilar Aizpurua Galdeano; María Aparicio Rodrigo; María Mercedes Fernández Rodríguez; María Jesús Esparza Olcina; Carlos Ochoa Sangrador;