Semi-Supervised Mixture Multi-Source Exchangeability Model Approach for Incorporating Real World Data into Randomized Controlled Trial Analyses Lillian Moran Fitzmorris Haine, University of Minnesota; Thomas Murray , University of Minnesota ; Raquel Nahra, Cooper Medical School of Rowan University and Cooper University Health Care; Giota Touloumi, Department of Hygiene, Epidemiology Medical Statistics, Medical School, National; Eduardo Fernández-Cruz, Hospital General Universitario Gregorio Marañón, Servicio de Immunología Clínica, Madrid; Kathy Petoumenos, The Kirby Institute, University of New South Wales, Sydney, Australia; Joseph Koopmeiners, University of Minnesota - Minneapolis, MN