A digital health research platform for community engagement, recruitment, and retention of sexual and gender minority adults in a national longitudinal cohort study- - The PRIDE Study. - Mitchell R. Lunn; Micah Lubensky; Carolyn Hunt; Annesa Flentje; Matthew R. Capriotti; Chollada Sooksaman; Todd Harnett; Del Currie; Chris Neal; Juno Obedin-Maliver (J. Am. Medical Informatics Assoc., 2019)