Clinical characteristics of CLL patients of groups A and B.

<p>A – the group of 43 patients analyzed by qRT-PCR for PD-1, PD-L1 and their splicing variants.</p><p>B – the group of 45 patients analyzed by flow cytometry method.</p><p>Detailed characteristics of CLL patients are presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035178#pone.0035178.s004" target="_blank">Table S1</a>.