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Marron M, Brackmann LK, Schwarz H, Hummel-Bartenschlager W, Zahnreich S, Galetzka D, Schmitt I, Grad C, Drees P, Hopf J, Mirsch J, Scholz-Kreisel P, Kaatsch P, Poplawski A, Hess M, Binder H, Hankeln T, Blettner M, Schmidberger H.Marron M, et al. Among authors: hopf j.JMIR Res Protoc. 2021 Nov 11;10(11):e32395. doi: 10.2196/32395.JMIR Res Protoc. 2021.PMID: 34762066Free PMC article.