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1) Line drawings – #FOAMed Medical Education Resources by Life in the Fast Lane (LITFL) is licensed under a Creative Commons Attribution-Non-Commercial-ShareAlike 4.0 International License. Available at https://lifeinthefastlane.com/investigations/cxr-normal/  Accessed, June 30, 2017.

2) Jill E. Jacobs, MD; Larry A. Latson Jr., MS, MD; Suhny Abbara, MD, et al. ACR Appropriateness Criteria® Acute Chest Pain – Suspected Aortic Dissection. American College of Radiology. Available at https://acsearch.acr.org/docs/69402/Narrative/ Accessed, June 30, 2017.

3) Learning radiology : recognizing the basics. William Herring author. Elsevier 2016 Online access USask Library. http://usl-primo.hosted.exlibrisgroup.com/primo_library/libweb/action/search.do?vid=USASK Accessed, June 30, 2017.

4) Jens Vogel-Claussen, MD; Amany S. M. Elshafee, BCh, MB; Jacobo Kirsch, MD, et al.  ACR Appropriateness Criteria® Dyspnea – Suspected Cardiac Origin. Available at https://acsearch.acr.org/docs/69407/Narrative/ Accessed June 30, 2017.

5) Grainger and Allison’s diagnostic radiology : a textbook of medical imaging. Andy Adam editor.; Adrian K. Dixon editor.; Jonathan H. Gillard 1964- editor.; Cornelia Schaefer-Prokop editor.; David J Allison; Elsevier (Firm) 2015, Online access USask Library. http://usl-primo.hosted.exlibrisgroup.com/primo_library/libweb/action/search.do?vid=USASK  Accessed June 30, 2017.