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Hass HG, Smith U, Jäger C, Schäffer M, Wellhäuber U, Hehr T, Markmann HU, Nehls O, Denzlinger C.Hass HG, et al.Onkologie. 2011;34(12):682-6. doi: 10.1159/000334545. Epub 2011 Nov 21.Onkologie. 2011.PMID: 22156447
Hass HG, Schmidt A, Nehls O, Kaiser S.Hass HG, et al.Oral Oncol. 2008 Jan;44(1):78-85. doi: 10.1016/j.oraloncology.2006.12.013. Epub 2007 Mar 9.Oral Oncol. 2008.PMID: 17350326
Hass HG, Jobst J, Vogel U, Scheurlen M, Nehls O.Hass HG, et al.Oncol Res Treat. 2014;37(12):732-8. doi: 10.1159/000369151. Epub 2014 Nov 21.Oncol Res Treat. 2014.PMID: 25531719
Nehls O, Klump B, Arkenau HT, Hass HG, Greschniok A, Gregor M, Porschen R.Nehls O, et al. Among authors: hass hg.Br J Cancer. 2002 Sep 23;87(7):702-4. doi: 10.1038/sj.bjc.6600543.Br J Cancer. 2002.PMID: 12232749Free PMC article.Clinical Trial.