VH4.21-encoded natural autoantibodies with anti-i specificity mirror those associated with cold hemagglutinin disease.
Schutte ME, van Es JH, Silberstein LE, Logtenberg T. VH4.21-encoded natural autoantibodies with anti-i specificity mirror those associated with cold hemagglutinin disease. J Immunol. 1993 Dec 01; 151(11):6569-76.