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Tear film inflammatory mediators during continuous wear of contact lenses and corneal refractive therapy
  1. Carrie Huisingh1,
  2. Gerald McGwin Jr1–3
  1. 1Center for Clinical and Translational Sciences, University of Alabama at Birmingham, Birmingham, Alabama, USA
  2. 2Department of Epidemiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
  3. 3Department of Ophthalmology, University of Alabama at Birmingham, Birmingham, Alabama, USA
  1. Correspondence to Dr Gerald McGwin, Departments of Epidemiology and Ophthalmology, University of Alabama at Birmingham, 609 Eye Foundation Hospital, 1720 University Boulevard, Birmingham, AL 35294, USA; mcgwin{at}uab.edu

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The recently published study by González-Pérez et al1 is described as a prospective, case-control study; however, this is incorrect. The study participants were selected based on an exposure of interest, continuous wear of contact lenses, and were matched with controls with respect to age, refractive error and …

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