General introduction 31 1 73. Coyer L, Boyd A, Schinkel J, et al. SARS-CoV-2 antibody prevalence and determinants of six ethnic groups living in Amsterdam, the Netherlands: a population-based cross-sectional study, June-October 2020. medRxiv 2021: 2021.03.08.21252788. 74. van Griensven GJ, de Vroome Em Fau - Goudsmit J, Goudsmit J Fau - Coutinho RA, Coutinho RA. Changes in sexual behaviour and the fall in incidence of HIV infection among homosexual men. (0959-8138 (Print)). 75. Snijder MB, Galenkamp H, Prins M, et al. Cohort profile: the Healthy Life in an Urban Setting (HELIUS) study in Amsterdam, The Netherlands. BMJ Open 2017; 7(12): e017873. 76. van Gils MJ, van Willigen HD, Wynberg E, et al. Single-dose SARS-CoV-2 vaccine in a prospective cohort of COVID-19 patients. medRxiv 2021: 2021.05.25.21257797. 77. Met één vaccinatie beschermd na doorgemaakte COVID-19-infectie. Ministry of Health, Welfare and Sport Vol. 2022: Government of the Netherlands, 2021.
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