The study was done as one if Obama's 23 gun control executive orders after the sandy hook incident.
http://news.blogs.cnn.com/2013/01/16/obama-to-announce-gun-control-proposals-shortly/
14. “Issue a presidential memorandum directing the Centers for Disease Control to research the causes and prevention of gun violence.”
Numerous studies have already been done by the CDC's Morditity group ... investigating deaths caused by firearms. The Injury Prevention group has also looked into firearm deaths. So have others.
I have not read the recent, presidential study, but it gathered no new data or no new vast amount of data. If they wanted to do this right, it would have been a 10 yr study.
The state of CA also requires testing of handguns to insure their "safety" and no handgun is known to the state to have failed their required testing and CA has put on their "approved" list tens of thousands of handguns over time. Its now clear that the CA testing requirements now have nothing to do with safety and all to do with trying to limit gun ownership.
The results of all these studies and testing results in a conclusion that guns are basically safe instruments and that deaths are either from suicide, horseplay, and criminal activity. Not from ordinary folks carrying. But public officials do not care...they are antis for the most part.