1790
These results suggest that peripheral iron dextran can increase the iron level in the SN , where excessive iron causes the degeneration of dopaminergic neurons .
 Chemical: iron dextran; Chemical: iron; Chemical: iron; Disease: degeneration of dopaminergic neurons
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:
 Chemical: iron dextran; Chemical: iron; Chemical: iron; Disease: degeneration of dopaminergic neurons