Chang, Ying-Ju Ruby Low-Frequency Ultrasound Debridement in Chronic Wound Healing: A Systematic Review of Current Evidence. [electronic resource] - Plastic surgery (Oakville, Ont.) Feb 2017 - 21-26 p. digital Publication Type: Journal Article ISSN: 2292-5503 Standard No.: 10.1177/2292550317693813 doi