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Liewald F, Dienemann H, Sunder-Plassmann L.Liewald F, et al. Among authors: dienemann h.Dtsch Med Wochenschr. 1989 Nov 3;114(44):1692-6. doi: 10.1055/s-2008-1066815.Dtsch Med Wochenschr. 1989.PMID: 2553382German.