11542
In aphakia mice , virtually all surviving mDA neurons in the substantia nigra ( SN ) and the majority of neurons in the adjacent ventral tegmental area ( VTA ) also express calbindin - D28k , a calcium - binding protein previously associated with resistance to injury in PD and in animal models .
 Chemical: calcium
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: calcium