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We used high - resolution MRI and surface - based computational image analyses to map regional abnormalities in the cortex , hippocampus , white matter , and ventricles in 22 human subjects who used MA and 21 age - matched , healthy controls .
 Disease: abnormalities in the cortex , hippocampus , white matter , and ventricles; Chemical: MA
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: abnormalities in the cortex , hippocampus , white matter , and ventricles; Chemical: MA