Oral saliva swab reverse transcription PCR for Covid-19 in the paediatric population - Moraleda, Cinta; Dominguez-Rodriguez, Sara; Miguel Mesa, Juan; Garcia-Sanchez, Paula; de la Serna, Maria; Antonio Alonso-Cadenas, Jose; Bermejo, Amanda; Sabrido, Gema; Martinez-Campos, Leticia; Flavia Gonzalez-Posada, Aranzazu; Illan-Ramos, Marta; Cobos-Carrascosa, Elena; et al. (ARCHIVES OF DISEASE IN CHILDHOOD, 2022)