ERX7763933 COG-UK/PHEC-3Z067Z6C/PHEC:NS01_21_0093 ERP121228 PRJEB37886 ERS10282623 SAMEA12676270 AMPLICON VIRAL RNA PCR COVIDSeq Test|Internal COVIDSeq Test Illumina NovaSeq 6000 artic_primer_version 3 artic_protocol_version ARCTIC