Table 1. Consensus values of the RT-dPCR analyses by three NMIs, reported as the overall mean and its 95%-CI of the three NMI-specific results.

Reference material	Consensus value SARS-CoV-2 RNA load ± expanded uncertainty (copies/mL)
RM 1	(1.24 ± 0.36) x 107
RM 2	(1.23 ± 0.33) x 106