Key changes to improve social presence of a virtual health assistant promoting colorectal cancer screening informed by a technology acceptance model. - Melissa J. Vilaro; Danyell S. Wilson-Howard; Mohan Zalake; Fatemeh Tavassoli; Benjamin Lok; François Modave; Thomas J. George; Folakemi Odedina; Peter J. Carek; Janice L. Krieger (BMC Medical Informatics Decis. Mak., 2021)