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K Groth A, Graf R.K Groth A, et al. Among authors: graf r.Aesthetic Plast Surg. 2020 Feb;44(1):1-12. doi: 10.1007/s00266-019-01521-3. Epub 2019 Oct 17.Aesthetic Plast Surg. 2020.PMID: 31624894Review.