Author: Ingrid Arevalo-Rodriguez; Diana Buitrago-Garcia; Daniel Simancas-Racines; Paula Zambrano-Achig; Rosa del Campo; Agustin Ciapponi; Omar Sued; Laura Martinez-Garcia; Anne Rutjes; Nicola Low; Jose A Perez-Molina; Javier Zamora
Title: FALSE-NEGATIVE RESULTS OF INITIAL RT-PCR ASSAYS FOR COVID-19: A SYSTEMATIC REVIEW Document date: 2020_4_21
ID: g8h6trql_35
Snippet: Regarding RT-PCR testing, the RT-PCR brand/manufacturer was reported by two studies [24, 25] , No 213 studies reported criteria for positivity. Most of the studies based their assessment on throat 214 samples, such as pharyngeal, nasal and oropharyngeal swabs. Four studies provided information 215 about the time since the initial RT-PCR to repeated testing (Table 1) . 216.....
Document: Regarding RT-PCR testing, the RT-PCR brand/manufacturer was reported by two studies [24, 25] , No 213 studies reported criteria for positivity. Most of the studies based their assessment on throat 214 samples, such as pharyngeal, nasal and oropharyngeal swabs. Four studies provided information 215 about the time since the initial RT-PCR to repeated testing (Table 1) . 216
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