Citations

http://www.webmd.com/anxiety-panic/tc/panic-attacks-and-panic-disorder-treatment-overview

http://www.helpguide.org/mental/panic_disorder_anxiety_attack_symptom_treatment.htm

http://www.theravive.com/services/panic-attacks-phobias.htm

http://www.eurekalert.org/pub_releases/2011-07/smu-opa072711.php

http://adaa.org/understanding-anxiety/panic-disorder-agoraphobia

http://adaa.org/understanding-anxiety/panic-disorder-agoraphobia/treatment