Joseph A. Schwartz, Kevin M. Beaver Comprehensive Psychiatry 55 (January):93-103 http://www.sciencedirect.com/science/article/pii/S0010440X13001399 2014 Date Sat, 06/14/2014 - 03:00 PM Research Types Dopamine Genetic Influence Genetic Polymorphisms Kevin M. Beaver Sibling Pairs