Data collection of this TTT-study was described previously [13 (link)]. In short, all available clinical data (including biomarkers tested for routine care, a study specific nasal swab and information from a 28-day follow-up assessment) was recorded in an electronic Case Report Form (eCRF) [13 (link)]. A multiplex PCR-based assay of the 14 most common respiratory pathogens (nine viruses, five bacteria) was performed on all nasal swabs (MagnaPure LC total nucleic acid kit and MagnaPure 96 DNA, Roche Diagnostics, Mannheim, Germany) [15 (link)]. The PCR results were not available for the attending physician, since this assay was performed after completion of the recruitment process.
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