Packer, M., Schiattarella, G. G., Petrie, M. C., Burkhoff, D., Butler, J., Lam, C. S., Zannad, F., Vaduganathan, M., Borlaug, B. A. (2026). Does Characterization of Phenotypic Heterogeneity Provide Mechanistic Insights or Influence the Response to Treatment? Experience in Positive and Neutral Trials in Patients With Heart Failure and a Preserved Ejection Fraction. Circulation. https://doi.org/10.1161/circulationaha.126.079235