220
OBJECTIVE : The pharmacological response to drugs that act on the cholinergic system of the iris has been used to predict deficits in central cholinergic functioning due to diseases such as Alzheimer ' s disease , yet correlations between central and peripheral responses have not been properly studied .
 Disease: Alzheimer ' s disease
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: Alzheimer ' s disease