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Celik VK, Sari I, Engin A, Gürsel Y, Aydin H, Bakir S.Celik VK, et al. Among authors: gursel y.Clinics (Sao Paulo). 2010 Jul;65(7):697-702. doi: 10.1590/S1807-59322010000700008.Clinics (Sao Paulo). 2010.PMID: 20668627Free PMC article.