Timing and source of the maximum of the transthoracic impedance cardiogram (dZ/dt) in relation to the H-I-J complex of the longitudinal ballistocardiogram under gravity and microgravity conditions. - Elena Luchitskaya; Quentin Delière; Andre Diedrich; Nathalie Pattyn; Alexandre Almorad; L. Beck; Peter Gauger; U. Limper; Irina Funtova; Roman M. Baevsky; Pierre-François Migeotte; Jens Tank (EMBC, 2013)