Piccirillo, M. R., Natale, A., Trosino, G., Sebastopoli, M., Vivona, G., De Martino, G., Ismeno, G., Piazza, L. and Belloni, L. (2005) “What’s the best assessment of preload after cardiac surgery?”, Monaldi Archives for Chest Disease, 64(1). doi: 10.4081/monaldi.2005.606.