Ponce, P., Cruz, J., Travassos, J., Moreira, P., Lima, J. A., Pedro, A. G., Ferreira, A. C., & Antunes, J. L. (1995). A diaphragmatic pacemaker in the treatment of ventilatory failure. Acta Médica Portuguesa, 8(11), 639–42. https://doi.org/10.20344/amp.2757