Crotti L, Lewandowska MA, Schwartz PJ, Insolia R, Pedrazzini M, Bussani E, Dagradi F, George AL, Pagani F. A KCNH2 branch point mutation causing aberrant splicing contributes to an explanation of genotype-negative long QT syndrome. Heart Rhythm. 2009 Feb;6(2):212–8. doi: 10.1016/j.hrthm.2008.10.044. PMID: 19187913.