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Hagel S, Elznerova T, Dietrich W, Schrauzer T, John S.Hagel S, et al.Cases J. 2009 Aug 25;2:7501. doi: 10.4076/1757-1626-2-7501.Cases J. 2009.PMID: 19918467Free PMC article.
Weber M, Hagel S, Stallmach A.Weber M, et al. Among authors: hagel s.Dtsch Med Wochenschr. 2014 Jun;139(25-26):1357-68; quiz 1369-72. doi: 10.1055/s-0034-1369993. Epub 2014 Jun 10.Dtsch Med Wochenschr. 2014.PMID: 24914514Review.German.No abstract available.