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| Teeter Comfort Cushion—Plush Padded Surface with Microfiber Shell—Accessory for Inversion Tables. Online, published date Jan. 11, 2017. Retrieved on Apr. 14, 2019 from URL: https://www.amazon.com/Teeter-Comfort-Cushion-Microfiber-Accessory/dp/B07HPBKJFV/ref=sr_1_9?qid=1555271547&refinements=p_89%3ATeeter&s=exercise. |
| Teeter Better Back Comfort Cushion. Online, published date unknown. Retrieved on Apr. 14, 2019 from URL: https://relaxtheback.com/products/teeter-better-back-comfort-cushion. |