The National Heart, Lung, and Blood Institute (NHLBI) is inviting comments on the potential development of a Challenge Prize for Heart Failure (HF) Phenotyping. Input from the scientific research community and general public is welcomed on:

1. Scientific gaps and needs to be addressed by HF classifications or subphenotyping
2. Important existing data needed to develop novel HF classification systems
3. Feasibility and structure of a challenge prize competition on HF classification systems
4. Potential judging criteria

Submit comments here by May 15, or search for NIH Guide Notice NOT-HL-19-685 on NIH.gov. Questions? Contact nhlbichallengeinput@nhlbi.nih.gov.