%0 Journal Article %J BMJ Open %D 2021 %T Prevalence and incidence of anti-SARS-CoV-2 antibodies among healthcare workers in Belgian hospitals before vaccination: a prospective cohort studyObjectivesDesignSettingParticipantsOutcome measuresResultsConclusionsTrial registration number %A Laure Mortgat %A Kristien Verdonck %A Veronik Hutse %A Isabelle Thomas %A Cyril Barbezange %A Heyndrickx, Leo %A Nathalie Fischer %A Vuylsteke, Bea %A Ines Kabouche %A Ariƫn, Kevin K %A I Desombere %A Els Duysburgh %B BMJ Open %V 11 %8 May-06-2023 %G eng %N 6 %R 10.1136/bmjopen-2021-050824