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