The film is primarily the narratives of many first responders, so they play a large roll in the meassage being protrayed. They are seen as heros but also paid the price of their decisions through health issues.
No bibliography was given, but the citations that are used in the article are likely from medical records or government records of some sort.
It is difficult to determine where this document comes from. It deals with medicaid, so it is related to the government and healthcare.
It is supported by the 1992 and 2003 General Conference Resolutions, which provided the basis or understanding that there was a need for programs like this one.
Most of the data was collected through the stories that the people told the researchers. This was the best way for them to collect data, since most conditions are best told through stories. They were then able to pull numbers out or ask specific questions catered to the story.
This article is not about a disaster. Just allow more medical stories to circulate.
The author compares existing and previous nuclear regulation/safety/etc committees, analyzing differences between them and various shortcomings. This information is used to develop the author's idea of a more effective and safe oganization to enforce regulations and train an emergency response team.
The author also looked at how previous emergencies were handled and what new regulations stemmed from each, as well as how those have worked since their implementation, and what more can be done.