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(A) Regranex® (Healthpoint Biotherapeutics, Arlington, TX), a platelet-derived growth factor therapy that utilizes an amorphous hydrogel as a vehicle for its active ingredient, being applied to a sacral decubitus ulcer. (B) Flexigel (Smith and Nephew) hydrogel flexible sheet dressing applied to a nonhealing wound of the lower breast. To see this illustration in color, the reader is referred to the web version of this article at www.liebertpub.com/wound
