It's simple. Purchase a permanent subscription to Challenger/Damjanov Linder^®. For your one-time purchase, we'll send you the most current version immediately. Then, for a minimal fee, you'll receive yearly upgrades of this essential course forever.

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This all-in-one offer delivers every Challenger computer-based program to you automatically. You will receive continuous updates to every course in our library and all new courses released by Challenger forever. Save thousands with a one-time enrollment and never worry about on-hand review courses ever again.

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Challenger is the leading producer of electronic clinical competency testing and training courses in the world. We produce a wide variety of computer-based learning programs and are continually adding new products to our library.

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