This Funding Opportunity Announcement (FOA) encourages applications for Phased Innovation (R21/R33) grant awards to utilize 3D printing technologies to develop implantable devices and biodegradable scaffolds for long-term use that will adapt to the needs of growing children. This FOA provides support for up to two years (R21 phase) for research planning activities and feasibility studies, followed by a possible transition to expanded research support (R33 phase). Transition to the R33 depends on the completion of applicant-defined milestones, as well as program priorities and the availability of funds.

http://grants.nih.gov/grants/guide/rfa-files/RFA-HD-17-002.html