*Author’s correction In the original version of this article published on 5 March 2020, a wrong sequence was presented for the probe and quencher (5´-Fam-ACACTAG/ZEN/ CCATCCTTACTGCGCTTCG-BHQ-3´). At the request of the authors, this was corrected to read 5´-Fam-ACACTAGCC/ZEN/ATCCTTACTGCGCTTCG-Iowa Black FQ-3’. This change was made on 11 March. Conflict of interest: ML received speaker honoraria and related travel expenses from Roche Diagnostics. All other authors had no conflicts of interest. Authors’ contributions: SP: planned and conceptualised the laboratory work, conducted experiments, wrote the manuscript draft; SR: planned and conducted experiments; DN: wrote the manuscript draft; ML: planned experiments, conceptualised the laboratory work, conceptualised the overall study.