9977
The present study was carried out to compare the relative efficacy of chest radiography by conventional method and HRCT in evaluating ILF which included 22 workers exposed to fibrogenic dust , who were subjected to clinical examination , pulmonary function testing , posteroanterior chest radiography and HRCT .
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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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