False-negative results of initial RT-PCR assays for COVID-19: A systematic review.
Ingrid Arevalo-RodriguezDiana Buitrago-GarciaDaniel Simancas-RacinesPaula Zambrano-AchigRosa Del CampoAgustín CiapponiOmar SuedLaura Martinez-GarcíaAnne W RutjesNicola LowPatrick M M BossuytJose A Perez-MolinaJavier ZamoraPublished in: PloS one (2020)
Protocol available on the OSF website: https://tinyurl.com/vvbgqya.