| http://www.w3.org/ns/prov#value | - We calculated the annual rate of corneal endothelial cell loss by assuming cell loss occurred as a first-order exponential process according to the following relationship: ECD9 = ECD0e???kt, in which ECD0 is ECD before surgery, ECD9 is ECD at 9 years after surgery, k is an exponential rate constant, and t is the time between examinations in years.
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