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. 2020 Jun 17;258(10):2173–2184. doi: 10.1007/s00417-020-04792-8

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© The Author(s) 2020

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Fig. 6 — Stress-strain bar plot of extensometer measurements in different CXL protocols. *P < 0.05 between 3 mW and controls. ⁺P < 0.05 between 9 mW and controls. ^#P < 0.05 between 3 mW and 18 mW. ^~P < 0.05 between 3 mW and 9 mW. °P < 0.05 between 18 mW and controls