DOI:
10.1055/s-00000031
Klinische Monatsblätter für Augenheilkunde
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References
Wagner H, Barr JT, Zadnik K.
collaborative longitudinal evaluation of keratoconus (CLEK) study: methods and findings to date.
Cont Lens Anterior Eye 2007;
30: 223-232
doi:10.1016/j.clae.2007.03.001
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