ERX4631451 COG-UK/BHRT-24B48EB/PHEC:201021_NS500628_0104_AHGML5AFX2 ERP121228 PRJEB37886 ERS5244894 SAMEA7488238 AMPLICON VIRAL RNA PCR Nextera_XT|Internal Nextera XT (reduced volume) NextSeq 550