Since TrxR is a key protein that maintains the normal function of the Trx system and BTK is an essential protein that regulates the BCR signalling pathway, a qualitative analysis of the expression levels of these two proteins in the NHL samples and normal tissues was conducted using the Human Protein Atlas (Table 2 and Figure S1) (www.proteinatlas.org, accessed on 1 January 2022). This evidence concerns the gene BTK and non-Hodgkin lymphoma.