Formation of the sinus node head and differentiation of sinus node myocardium are independently regulated by Tbx18 and Tbx3. - Wiese, C; Grieskamp, T; Airik, R; Mommersteeg, M; Gardiwal, A; de Gier-de Vries, C; Schuster-Gossler, K; Moorman, A; Kispert, A; Christoffels, V (Circulation research, 2009)