ERX5973804 COG-UK/PHWC-PYONJT/PHWC:210714_NB552523_0062_AH3HG3AFX3 ERP121228 PRJEB37886 ERS7165555 SAMEA9440699 AMPLICON VIRAL RNA PCR Nextera XT|Internal Nextera XT (reduced volume) NextSeq 550 artic_primer_version 3