Factors underlying COVID-19 booster vaccine uptake among adults in Belgium, Vermeiren, Elias, Van Loenhout Joris, Nasiadka Léonore, Stouten Veerle, Billuart Matthieu, Van Evercooren Izaak, Catteau Lucy, and Hubin Pierre , BMC Res Notes, 2023 Nov 11, Volume 16, Issue 1, (2023)