Needs assessment and planning for a clinic-community-based implementation program for hypertension control among blacks in New York City: a protocol paper oleh Joyce Gyamfi, Claire Cooper, Aigna Barber, Deborah Onakomaiya, Wen-Yu Lee, Jennifer Zanowiak, Moses Mansu, Laura Diaz, Linda Thompson, Roger Abrams, Antoinette Schoenthaler, Nadia Islam, Gbenga Ogedegbe