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  Indian J Med Microbiol
 

Figure 1: The mean pain score. *Mann–Whitney U-test, the comparison of epi-on and epi-off CXL, P = 0.042 on the 1st day and P = 0.044 on the 3rd day. CXL=Corneal collagen cross-linking

Figure 1: The mean pain score. *Mann–Whitney U-test, the comparison of epi-on and epi-off CXL, <i>P</i> = 0.042 on the 1<sup>st</sup> day and <i>P</i> = 0.044 on the 3<sup>rd</sup> day. CXL=Corneal collagen cross-linking