When a renter chooses to receive miles in the American Airlines AAdvantage program or the Delta Air Lines SkyMiles program, the Frequent Traveler Service Charge will be calculated based only on the Federal Excise Tax (7.5%) expense incurred by Alamo when it purchases miles from those airlines.
1 Medications, drugs, or substances causing Canker sores (2 listings) 2  Underlying causes of Canker sores. 3  Canker sores as a symptom.  Medical news summaries relating to Causes of Canker sores.
Canker sores appear inside the mouth. They usually are small ulcers. (minor aphthous ulcers) with a white, yellow or gray center and a flat. red border. Rarely, canker sores can be very large (major aphthous. ulcers) with a raised border.