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Heinzelmann-Schwarz V, Fedier A, Hornung R, Walt H, Haller U, Fink D.Heinzelmann-Schwarz V, et al. Among authors: walt h.Lasers Surg Med. 2003;33(3):182-9. doi: 10.1002/lsm.10213.Lasers Surg Med. 2003.PMID: 12949948
Müller S, Walt H, Dobler-Girdziunaite D, Fiedler D, Haller U.Müller S, et al. Among authors: walt h.J Photochem Photobiol B. 1998 Jan;42(1):67-70. doi: 10.1016/S1011-1344(97)00124-3.J Photochem Photobiol B. 1998.PMID: 9491597
Hornung R, Walt H, Crompton NE, Keefe KA, Jentsch B, Perewusnyk G, Haller U, Köchli OR.Hornung R, et al. Among authors: walt h.Photochem Photobiol. 1998 Oct;68(4):569-74.Photochem Photobiol. 1998.PMID: 9796440
Zimmermann A, Walt H, Haller U, Baas P, Klein SD.Zimmermann A, et al. Among authors: walt h.Cancer Chemother Pharmacol. 2003 Feb;51(2):147-54. doi: 10.1007/s00280-002-0549-9. Epub 2002 Dec 6.Cancer Chemother Pharmacol. 2003.PMID: 12647016
Dobler-Girdziunaite D, Burkard W, Haller U, Larsson B, Walt H.Dobler-Girdziunaite D, et al. Among authors: walt h.Strahlenther Onkol. 1995 Nov;171(11):622-9.Strahlenther Onkol. 1995.PMID: 7502225German.