Researchers examined the impact of the environment and genes across 560 common conditions. The results of a new Harvard Medical School (HMS) twin study examined the way different factors affect insurance rates. The research was conducted in conjunction with the University of Queensland in Australia. The method used in order to examine the factors involved in calculating insurance premiums was novel. The researchers used twin data sets provided by Aetna insurance company. That insurer did not provide funding for this study. Instead, the insurance rates research was supported by grants…