Using Patients' Social Network to Improve Compliance to Outpatient Screening Colonoscopy Appointments Among Blacks: A Randomized Clinical Trial. - Laiyemo AO; Kwagyan J; Williams CD; Rogers J; Kibreab A; Jack MA; Lee EE; Brim H; Ashktorab H; Howell CD; Smoot DT; Platz EA (The American journal of gastroenterology, 2019)