Elements of successful NIH grant applications https://www.pnas.org/doi/10.1073/pnas.2315735121 Houmam Araj https://orcid.org/0009-0000-2122-5741 houmam.araj@nih.gov, Leroy Worth Jr. https://orcid.org/0009-0002-8217-6458, and David T. Yeung NIH, Proposal writing