Bukhari, Syed Hassaan Ahmed Palmieri, Flavio Ramírez, Julia Laguna, Pablo Ruiz, José Esteban Ferreira, Dina Potse, Mark Sánchez, Carlos Pueyo, Esther Characterization of t wave amplitude, duration and morphology changes during hemodialysis: Relationship with serum electrolyte levels and heart rate IEEE trans. biomed. eng. 10.1109/TBME.2020.3043844 2021 2021