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Holden PK, Li C, Da Costa V, Sun CH, Bryant SV, Gardiner DM, Wong BJ.Holden PK, et al.Lasers Surg Med. 2009 Sep;41(7):487-91. doi: 10.1002/lsm.20795.Lasers Surg Med. 2009.PMID: 19639619Free PMC article.