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A recent approach for estimating rates of retinal ganglion cell loss using a combination of structural and functional tests has been shown to perform better than isolated parameters from conventional tests for diagnosing , staging and detecting glaucoma progression and may prove useful as an outcome measure in clinical trials of the disease .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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