“…These include reports on genetic association with neuroendocrine function and its role in temperament and alcohol consumption (e.g., cortiotropin-releasing hormone haplotype, Barr, Dvoskin, et al, 2008), alcohol response (mu opioid receptor gene, Barr et al, 2007), infant attachment behavior (mu opioid receptor gene, Barr, Schwandt, et al, 2008), and susceptibility to the side effects of neuroleptic drugs (dopamine 3 receptor, Werge, Elbaek, Andersen, Lundbaek, & Rasmussen, 2003). Taken together, these findings provide strong evidence that evaluation of specific genetic variation is a useful research avenue for uncovering sources of individual variation in a broad range of behavioral and biological phenotypes.…”