Due to this high prevalence, vertebral artery hypoplasia (VAH) has not yet been considered an independent risk factor for ischemic stroke [1,2].
How to use your own headphones on Americanâs new 777-300ER. Passengers traveling in First and Business Class on Americanâs new 777-300ER are provided with Bose QuietComfort 15 Acoustic Noise Canceling headphones to use during the flight.
1 The Beats Executive sound profile reproduces clear highs, deep bass, and sonically true Mids.  What's In The Box: Beats Executive over-ear headphones ,Two (2) AAA batteries ,3.5-millimeter audio cable ,1/4-inch audio adapter ,Airline adapter ,In-line control and mic cable (features may vary) ,Hard shell carrying case.