1. Beauchamp TL, Childress JF (1979) The principles of biomedical ethics. Oxford University Press, Oxford
2. Beecher HK (1966) Ethics and clinical research. N Engl J Med 274(24):1354–1360
3. Borrel-Carrió F, Suchman AL, Epstein RM (2004) The biopsychosocial model 25 years later: principles, practice, and scientific enquiry. Ann Fam Med 2(6):576–582
4. Brandon RN (1996) Concepts and methods in evolutionary biology. Cambridge University Press, Cambridge
5. Cantopher T (2012) Depressive illness: the curse of the strong, 3rd edn. Sheldon Press, London