Volume 55, no. 6, p. 1720-1732, 2017, https://doi.org/10.1128/JCM.00162-17. Page 1731, Acknowledgments section: The conflict-of-interest statement "A.E.B. and P.H.M.S. have proprietary rights to the IS-pro technique and are co-owners of the spin-off company IS-Diagnostics" should be added. This statement should have been included in the article originally.