Eating disorder portion of the vulnerability to develop eating disorders can be inherited, and there is evidence to show that there is a genetic locus that shows susceptibility for developing anorexia nervosa. About 60% of eating disorder cases are attributable to biological and genetic components. Other cases are due to external reasons or developmental problems. There are also other neurobiological factors at play tied to emotional reactivity and impulsivity that could lead to binging and purging behaviors. Epigenetics: Epigenetic mechanisms are means by which environmental effects alter gene expression via methods such as DNA methylation; these are independent of and do not
The Hunger Games (novel) reviewers and authors. It was praised for its plot and character development. In writing "The Hunger Games", Collins drew upon Greek mythology, Roman gladiatorial games, and contemporary reality television for thematic content. The novel won many awards, including the California Young Reader Medal, and was named one of "Publishers Weekly"s "Best Books of the Year" in 2008. "The Hunger Games" was first published in hardcover on September 14, 2008, by Scholastic, featuring a cover designed by Tim O'Brien. It has since been released in paperback and also as an audiobook and ebook. After an initial print of 200,000, the book