I'd like some euros http://genericlevitraonline.in.net/ levitra 20 Keeping in mind that "not all correlations imply causation," the trio obtained data from 60 primary studies that analyzed 45 different conflicts, published in 26 different journals that "represent the work of over 190 researchers from around the world." The periods under study ranged from 10,000 BCE to today, and covered all "major" global geographies.