APA style. APA Style is a writing style and format for academic documents such as journal articles and books. It is described in the style guide of the American Psychological Association (APA), which is titled the Publication Manual of the American Psychological Association.
A pain doctor, also called a pain specialist or pain management specialist, is a medical doctor (M.D.) or doctor of osteopathy (D.O.) who specializes in pain medicine.
, Pain Management Physician and Anesthesiologist (2002-present) Sharp pain in the chest that persists requires medical evaluation. Possible casues range from minor muscle strain, to infection or even blood clots in the lung. If the pain is associated with difficulty breathing, an emergency room visit is appropriate.