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Cheung KL, Eggers SM, de Vries H.Cheung KL, et al.Int J Environ Res Public Health. 2020 Dec 23;18(1):28. doi: 10.3390/ijerph18010028.Int J Environ Res Public Health. 2020.PMID: 33374522Free PMC article.
Cheung KL, Ten Klooster PM, Smit C, de Vries H, Pieterse ME.Cheung KL, et al.BMC Public Health. 2017 Mar 23;17(1):276. doi: 10.1186/s12889-017-4189-8.BMC Public Health. 2017.PMID: 28330465Free PMC article.
Cheung KL, Wijnen B, de Vries H.Cheung KL, et al.J Med Internet Res. 2017 Jun 23;19(6):e230. doi: 10.2196/jmir.7209.J Med Internet Res. 2017.PMID: 28645889Free PMC article.Review.
Cheung KL, Schwabe I, Walthouwer MJL, Oenema A, Lechner L, de Vries H.Cheung KL, et al.Int J Environ Res Public Health. 2017 Oct 23;14(10):1275. doi: 10.3390/ijerph14101275.Int J Environ Res Public Health. 2017.PMID: 29065545Free PMC article.Clinical Trial.
Cheung KL, de Ruijter D, Hiligsmann M, Elfeddali I, Hoving C, Evers SMAA, de Vries H.Cheung KL, et al.BMC Public Health. 2017 Nov 21;17(1):890. doi: 10.1186/s12889-017-4902-7.BMC Public Health. 2017.PMID: 29162043Free PMC article.Review.