Ex-post verification analysis
STERILE
In case of discordance between the results obtained with the reference method, performed by the central laboratory within the hospital, and the MBS AST POCT, a verification analysis was performed at the Science Department of Roma Tre University, Rome, strictly within one or two days, to investigate the source of discordance. Analyses were repeated with both reference method and MBS AST POCT using aliquots of urine samples stored at -80°C using sterile glycerol at a final 15% (vol/vol) concentration maximum after 7 days from collection. The reference method chosen for ex-post analysis was the Kirby-Bauer diffusion disk test, as the traditional and most widely used approach [