No, matching funds are not required, but supplemental funding is welcomed and encouraged. The ability to leverage other funding for the proposed research project is not a criterion for awarding grants, but it may be a consideration in the decision-making process. Awards may also be used to add a supplemental component to an existing project funded by another source; for example, if there is an existing, funded intervention study taking place in another country, this CFP could fund a supplemental study about translating or adapting the intervention to a U.S. setting.