We are seeking grant applications which bridge the gap between promising pilot laboratory data and the development of new therapeutics or new clinical assessments for Phelan-McDermid syndrome (PMS). Example areas of interest include but are not limited to: follow-up characterization studies to drug screens, cross-disorder clinical approaches, funding for remaining experiments before solidifying a pharmaceutical relationship, and adjustment of assessments or the development of new assessments which more accurately measure Phelan-McDermid syndrome phenotypes. Applications with clinical relevance will be preferred.