Agrawal, A. & Lynskey, M. T. (2008). Are there genetic influences on addiction: Evidence from family, adoption and twin studies. Addiction, 103(7), 1069-1081. Boomsma, D., Busjahn, A. & Peltonen, L. (2002). Classical twin studies and beyond. Nature Reviews: Genetics,3, 872-882. Bouchard Jr, T. J. & Loehlin, J. C. (2001). Genes, […]