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European Radiology|March 1, 2002
Intranet and radiology: a critical appraisal of radiological applications of Intranet technologySteffen AchenbachJournal of Travel Medicine|November 17, 1998
Update on the Epidemiology of Traveler's Diarrhea in East AfricaAngst, SteffenBulletin De La Societe De Pathologie Exotique (1990)|March 17, 1999
[Traveller's diarrhea: progress and lessons drawn from recent surveys]R SteffenAdvances in Biochemical Engineering/Biotechnology|July 23, 2013
New bioproduction systems: from molecular circuits to novel reactor concepts in cell-free biotechnologySteffen RuppProceedings of the National Academy of Sciences of the United States of America|April 1, 1984
Proviruses are adjacent to c-myc in some murine leukemia virus-induced lymphomasD SteffenSchweizerische Medizinische Wochenschrift. Supplementum|January 1, 1984
[Epidemiology of travel diarrhea]R SteffenThe American Journal of Medicine|November 8, 2005
Changing travel-related global epidemiology of hepatitis ARobert SteffenPageof 5,323