The primer sequences used for qRT-PCR
| Name of primer | Sequences (5’−3’) |
| IGHV4-28-F | GCTCACATGGGAAATACTTTCT |
| IGHV4-28-R | CAGTCCTGGGCCCGACTCCT |
| GAPDH-F | CACCCACTCCTCCACCTTTG |
| GAPDH-R | CCACCACCCTGTTGCTGTAG |
F, forward; IGHV4, immunoglobulin heavy chain variable family 4 gene; qRT-PCR, quantitative reverse transcription-PCR; R, reverse.