Sutton LA, Kostareli E, Hadzidimitriou A, Darzentas N, Tsaftaris A, Anagnostopoulos A, Rosenquist R, Stamatopoulos K: Extensive Intraclonal diversification in a subgroup of chronic lymphocytic leukemia patients with stereotyped IGHV4-34 receptors: implications for ongoing interactions with antigen. Blood. 2009 Nov 12;114(20):4460-8. Epub 2009 Aug 27. PubMed PMID: 19713457. doi: http://dx.doi.org/10.1182/blood-2009-05-221309