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Gross N, Bachmann LM, Islam M, Faes L, Schmid MK, Thiel MA, Schimel A, Sim DA.Gross N, et al. Among authors: thiel ma.BMJ Open. 2021 Dec 23;11(12):e056940. doi: 10.1136/bmjopen-2021-056940.BMJ Open. 2021.PMID: 34949632Free PMC article.