COVID-19 mortality, excess mortality, deaths per million and infection fatality ratio, Belgium, 9 March 2020 to 28 June 2020, Molenberghs, Geert, Faes Christel, Verbeeck Johan, Deboosere Patrick, Abrams Steven, Willem Lander, Aerts Jan, Theeten Heidi, Devleesschauwer Brecht, Bustos Sierra Natalia, et al. , Eurosurveillance, May-02-2023, Volume 27, Issue 7, (2022)