1. Beauchamp TL, Childress JF (2008) Principles of biomedical ethics, 6th edn. Oxford University Press, New York, NY
2. Bosnjak S (2001) The Declaration of Helsinki—the cornerstone of research ethics. Arch Oncol 9(3):179–184
3. Carragee EJ, Ghanayem AJ, Weiner BK, Rothman DJ, Bono CM (2011a) A challenge to integrity in spine publications: years of living dangerously with the promotion of bone growth factors. Spine J 11(6):463–468
4. Carragee EJ, Hurwitz EL, Weiner BK (2011b) A critical review of recombinant human bone morphogenetic protein-2 trials in spinal surgery: emerging safety concerns and lessons learned. Spine J 11(6):471–491
5. Harran M, Roth J, Kuntz D, Lemmons R, Michael RA, Rickus K, Aretha D (2000) The Holocaust Chronicles: a history in words and pictures. Publications International, Lincolnwood, IL