Pellicori, P., Clark, A. L., Kallvikbacka-Bennett, A., Zhang, J., Urbinati, A., Monzo, L., Dierckx, R., Anker, S. D., & Cleland, J. G. (2017). Non-invasive measurement of right atrial pressure by near-infrared spectroscopy: preliminary experience. A report from the SICA-HF study. European journal of heart failure, 19(7), 883-892. https://doi.org/10.1002/ejhf.825