Educational services, namely, providing medical teaching and practical training on the use of aortic stents and stent grafts and parts, instruments, and fittings therefor and providing instructional materials in connection therewith; medical teaching and training services, namely, courses, classes, lessons, and seminars related to the use and operation of aortic stents and stent grafts; educational services, namely, providing classes, seminars, and lectures, all in the field of the diagnosis ...