13445
Arsenic induced neuronal apoptosis in guinea pigs is Ca2 + dependent and abrogated by chelation therapy : role of voltage gated calcium channels .
 Chemical: Arsenic; Chemical: Ca2 +; 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: Arsenic; Chemical: Ca2 +; Chemical: calcium