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METHOD : Thirteen patients who developed optic neuropathy after being treated with ethambutol for tuberculosis of the lung or lymph node at Siriraj Hospital between 1997 and 2001 were retrospectively reviewed .
 Disease: optic neuropathy; Chemical: ethambutol; Disease: tuberculosis of the lung or lymph node
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: optic neuropathy; Chemical: ethambutol; Disease: tuberculosis of the lung or lymph node