Zyderm collagen implantation.
D002610:Cheek / Q000601:surgery; D003094:Collagen / Q000009:adverse effects*; D062109:Dermatologic Surgical Procedures; D006099:Granuloma / Q000209:etiology*; D006801:Humans; D019736:Prostheses and Implants / Q000009:adverse effects*; D013518:Surgery, Plastic / Q000009:adverse effects*
D003094:Collagen