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Martin L. Stephens, PhD

  • Senior Research Associate

Departmental Affiliations

Center & Institute Affiliations

Contact Information

615 N. Wolfe Street
Room W7032
Baltimore, Maryland 21205


Evidence-based Toxicology Collaboration
AltTox: Non-animal Methods for Toxicity Testing
Center for Alternatives to Animal Testing

View Current Courses


PhD, The University of Chicago, 1984


My current efforts are directed primarily to establishing the discipline of evidence-based toxicology (EBT) by translating the principles and tools of evidence-based medicine to toxicity testing.  The nascent practice of EBT will focus primarily on assessing test methods and testing strategies.  Through the work of our EBT Collaboration (the parallel to the Cochrane Collaboration), these efforts will expand the means of test method validation and devise objective means of evaluating testing strategies.  Such work will facilitate the adoption of new testing methods based on perturbations of biological pathways, as envisioned in the National Research Council (NRC) report on “Toxicity Testing in the 21st Century.” 

Honors and Awards

Enhancement of Animal Welfare Award, Society of Toxicology

Recognition Award, Center for Alternatives to Animal Testing, Johns Hopkins University

The Doerenkamp-Zbinden Prize, Doerenkamp-Zbinden Foundation


  • Evidence-based toxicology, alternative methods, animals in research, 21st century toxicology
  • Stephens, M.L. and Mak, N. 2014.  History of 3Rs activity in toxicity testing: From Russell and Burch to 21st century toxicology. Pp. 1-43 in Reducing, Refining, and Replacing the Use of Animals in Toxicity Testing (D. Allen and M. Waters, eds.). Cambridge, UK, Royal Society of Chemistry. 

  • Stephens, M.L., Andersen, M., Becker, R, Betts, K., Boekelheide, K., Carney, E., Chapin, R., Devlin, D., Fitzpatrick, S., Fowle, J., Harlow, P., Hartung, T. Hoffmann, S., Holsapple, M., Jacobs, A., Judson, R., Naidenko, O., Pastoor, T., Patlewicz, G., Rowan, A., Scherer, R., Shaikh, R., Simon, T., Wolf, D., and Zurlo, J. 2013. Evidence-based toxicology for the 21st century: Opportunities and challenges. ALTEX, 30, 74-104.

  • Stephens, M.L., Barrow, C., Andersen, M.E., Boekelheide, K., Carmichael, P.L., Holsapple, M.P., Lafranconi, M. 2012.  Accelerating the development of 21st century toxicology: Outcome of a Human Toxicology Project Consortium workshop.  Toxicological Sciences 125:327-334.

  • Stephens, M.L. 2012. Pursuing Medawar’s challenge for full replacement. ALTEX Proceedings, 1/12, 23-26.

  • Krewski, D., Acosta Jr., D., Andersen, M., Anderson, H., Bailar III, J. C., Boekelheide, K., Brent, R., Charnley, G., Cheung, V. G., Green Jr., S., Kelsey, K.T., Kerkvliet, N.I., Li, A.A., McCray, L., Meyer, O., Patterson, R.D., Pennie, W., Scala, R. A., Solomon, G.M., Stephens, M., Yager, J., Zeise, L. and Staff of Committee on Toxicity Testing and Assessment of Environmental Agents. 2010. Toxicity testing in the 21st century: A vision and a strategy. Journal of Toxicology and Environmental Health, Part B, 13: 51-138.