Genetic investigation of FOXO3A requires special attention due to sequence homology with FOXO3B.
Flachsbart F, Möller M, Däumer C, Gentschew L, Kleindorp R, Krawczak M, Caliebe A, Schreiber S, Nebel A. Eur J Hum Genet. 2013 Feb; 21(2):240-2. Epub 2012 May 16.