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It is part of the ebola response, but does not disclose any sources of funding.

Examples from history are used to support claims from 9/11, as the author is a historian, and probably following the saying "history repeats itself" to show similarities between disasters and responses.

Newspaper atricles were also cited to show public response.

Thae laws are examined and explained to the reader. Examples of citations from physicians are also included with stories of the individual's journey and experiences.

The study addresses the survivors of Katrina fairly soon after the disaster, at a time when they likely do not have much stability. Many were without homes, may have lost family or friends, neighborhoods were torn apart, schools were destroyed, and money was very thin. It was not an easy time, so focusing on this group at such a stressful time was the goal of the study.

This article has been referenced in other articles that study disaster PTSD, mental health after hosting refugees from a disaster, and using epidemolody to help draft policies for disaster response. These papers all further the research and possible benefits for humanity.