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Gortner L, van Husen M, Thyen U, Gembruch U, Friedrich HJ, Landmann E.Gortner L, et al. Among authors: friedrich hj.Eur J Obstet Gynecol Reprod Biol. 2003 Sep 22;110 Suppl 1:S93-7. doi: 10.1016/s0301-2115(03)00178-7.Eur J Obstet Gynecol Reprod Biol. 2003.PMID: 12965096
Moller JC, Ballnus S, Kohl M, Gopel W, Barthel M, Kruger U, Friedrich HJ.Moller JC, et al. Among authors: friedrich hj.Pediatr Emerg Care. 2002 Dec;18(6):424-8. doi: 10.1097/00006565-200212000-00005.Pediatr Emerg Care. 2002.PMID: 12488835
Germer U, Kohl T, Smrcek JM, Geipel A, Berg C, Krapp M, Friedrich HJ, Diedrich K, Gembruch U.Germer U, et al. Among authors: friedrich hj.Arch Gynecol Obstet. 2002 Aug;266(4):187-92. doi: 10.1007/s00404-001-0250-y.Arch Gynecol Obstet. 2002.PMID: 12192475
Vieregge P, von Maravic C, Friedrich HJ.Vieregge P, et al. Among authors: friedrich hj.Can J Neurol Sci. 1992 May;19(2):170-3.Can J Neurol Sci. 1992.PMID: 1623441
Reusche E, Koch V, Friedrich HJ, Nünninghoff D, Stein P, Rob PM.Reusche E, et al. Among authors: friedrich hj.Clin Neuropathol. 1996 Nov-Dec;15(6):342-7.Clin Neuropathol. 1996.PMID: 8937781
Koch A, Kothe H, Braun J, Kämmerer R, Friedrich HJ, Dalhoff K.Koch A, et al. Among authors: friedrich hj.Pneumologie. 1998 Nov;52(11):614-21.Pneumologie. 1998.PMID: 9885511German.
Reiter A, Hake J, Meissner C, Rohwer J, Friedrich HJ, Oehmichen M.Reiter A, et al. Among authors: friedrich hj.Forensic Sci Int. 2001 Jun 15;119(2):248-53. doi: 10.1016/s0379-0738(00)00437-0.Forensic Sci Int. 2001.PMID: 11376991
Vieregge P, Schiffke KA, Friedrich HJ, Müller B, Ludin HP.Vieregge P, et al. Among authors: friedrich hj.Neurology. 1992 Aug;42(8):1453-61. doi: 10.1212/wnl.42.8.1453.Neurology. 1992.PMID: 1641135
Vieregge P, Friedrich HJ, Röhl A, Ulm G, Heberlein I.Vieregge P, et al. Among authors: friedrich hj.Nervenarzt. 1994 Jun;65(6):390-5.Nervenarzt. 1994.PMID: 8072593German.