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Gutjahr P, Schwenger M, Spaar HJ, Michaelis J, Niethammer D, Jürgens H, Kühl J, Ludwig R, Kutzner J, Schmidt D, et al.Gutjahr P, et al. Among authors: ludwig r.Dtsch Med Wochenschr. 1990 Feb 16;115(7):248-53. doi: 10.1055/s-2008-1065000.Dtsch Med Wochenschr. 1990.PMID: 2154366German.
Weirich A, Rieden K, Tröger J, Schmidt D, Ludwig R.Weirich A, et al. Among authors: ludwig r.Klin Padiatr. 1991 Jul-Aug;203(4):251-6. doi: 10.1055/s-2007-1025437.Klin Padiatr. 1991.PMID: 1658429German.
Schellong G, Hörnig I, Brämswig J, Bökkerink JP, Steinhoff A, Ludwig R, Niethammer D, Reiter A, von Lengerke HJ, Heinecke H, et al.Schellong G, et al. Among authors: ludwig r.Klin Padiatr. 1988 May-Jun;200(3):205-13. doi: 10.1055/s-2008-1033710.Klin Padiatr. 1988.PMID: 3062257Clinical Trial.German.
Weirich A, Leuschner I, Harms D, Vujanic GM, Tröger J, Abel U, Graf N, Schmidt D, Ludwig R, Voûte PA.Weirich A, et al. Among authors: ludwig r.Ann Oncol. 2001 Mar;12(3):311-9. doi: 10.1023/a:1011167924230.Ann Oncol. 2001.PMID: 11332141Free article.Clinical Trial.
Schumacher V, Schneider S, Figge A, Wildhardt G, Harms D, Schmidt D, Weirich A, Ludwig R, Royer-Pokora B.Schumacher V, et al. Among authors: ludwig r.Proc Natl Acad Sci U S A. 1997 Apr 15;94(8):3972-7. doi: 10.1073/pnas.94.8.3972.Proc Natl Acad Sci U S A. 1997.PMID: 9108089Free PMC article.
Tournade MF, Com-Nougué C, de Kraker J, Ludwig R, Rey A, Burgers JM, Sandstedt B, Godzinski J, Carli M, Potter R, Zucker JM; International Society of Pediatric Oncology Nephroblastoma Trial and Study Committee.Tournade MF, et al. Among authors: ludwig r.J Clin Oncol. 2001 Jan 15;19(2):488-500. doi: 10.1200/JCO.2001.19.2.488.J Clin Oncol. 2001.PMID: 11208843Clinical Trial.