Voulgari CH, Tentolouris N, Moyssakis I, Dilaveris P, Gialafos E, Papadogiannis D, Votteas V, Cokkinos DV, Stefanadis C, Katsilambros N. Spatial QRS-T angle: association with diabetes and left ventricular performance. European journal of clinical investigation. 2006;36:608–613.