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Virchows Archiv. B, Cell Pathology|September 29, 1975
The cell proliferation of epithelial metaplasia in the prostate gland. An autoradiographic in vitro studyB Helpap, R StiensLeber, Magen, Darm|September 1, 1983
[Comparative histologic studies following esophageal varices sclerosing with different substances]B Helpap, H HansenGeburtshilfe Und Frauenheilkunde|February 1, 1983
[Is tubal sterilization with the Tupla-clip a reversible method?]B Henkel, B HelpapPathology, Research and Practice|June 1, 1986
TUR-prostatitis. Histological and immunohistochemical observations on a special type of granulomatous prostatitisB Helpap, J VogelVirchows Archiv : an International Journal of Pathology|February 24, 2001
Immunohistochemical analysis of the proliferative activity of neuroendocrine tumors from various organs. Are there indications for a neuroendocrine tumor-carcinoma sequence?B Helpap, J KöllermannThoraxchirurgie, Vaskulare Chirurgie|April 1, 1976
[Pulmonary rhabdomyosarcoma (author's transl)]V Grouls, B HelpapWorld Journal of Urology|January 1, 1995
Nucleolar organizer regions in low- and high-grade carcinomas of the prostateB Helpap, C RiedeDer Pathologe|June 29, 2004
[Therapy induced regressive changes of prostate cancer]B Helpap, J KöllermannJournal of Cancer Research and Clinical Oncology|January 1, 1991
Histological and immunohistochemical findings of prostatic carcinoma after external or interstitial radiotherapyB Helpap, V KochPageof 39