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4. A summary of the findings from the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. CLEK Study Group. Szczotka LB; Barr JT; Zadnik K Optometry; 2001 Sep; 72(9):574-84. PubMed ID: 11575695 [TBL] [Abstract][Full Text] [Related]
5. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study: methods and findings to date. Wagner H; Barr JT; Zadnik K Cont Lens Anterior Eye; 2007 Sep; 30(4):223-32. PubMed ID: 17481941 [TBL] [Abstract][Full Text] [Related]
6. Baseline findings in the Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study. Zadnik K; Barr JT; Edrington TB; Everett DF; Jameson M; McMahon TT; Shin JA; Sterling JL; Wagner H; Gordon MO Invest Ophthalmol Vis Sci; 1998 Dec; 39(13):2537-46. PubMed ID: 9856763 [TBL] [Abstract][Full Text] [Related]
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10. Visual acuity repeatability in keratoconus: impact on sample size. Collaborative Longitudinal Evaluation of Keratoconus (CLEK) Study Group. Gordon MO; Schechtman KB; Davis LJ; McMahon TT; Schornack J; Zadnik K Optom Vis Sci; 1998 Apr; 75(4):249-57. PubMed ID: 9586749 [TBL] [Abstract][Full Text] [Related]
12. Extended long-term outcomes of penetrating keratoplasty for keratoconus. Pramanik S; Musch DC; Sutphin JE; Farjo AA Ophthalmology; 2006 Sep; 113(9):1633-8. PubMed ID: 16828503 [TBL] [Abstract][Full Text] [Related]
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18. Repeatability of refraction and corrected visual acuity in keratoconus. The CLEK Study Group. Collaborative Longitudinal Evaluation of Keratoconus. Davis LJ; Schechtman KB; Begley CG; Shin JA; Zadnik K Optom Vis Sci; 1998 Dec; 75(12):887-96. PubMed ID: 9875994 [TBL] [Abstract][Full Text] [Related]
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