The purpose of this Notice of Funding Opportunity (NOFO) is to solicit current or recently completed NHLBI K01, K08, K23, and K25 awardees for small grant support to expand their current research objectives or to branch out to a new study that resulted from the research conducted under the K award. Active NHLBI K01, K08, K23, and K25 awardees may apply for R03 support after the notices of award (NoA) for their first type-5 K awards have been issued. Recently completed NHLBI K01, K08, K23, and K25 awardees are elig...