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In this short review , we focus on the three well - studied ion channels in VSMCs , namely the L - type Ca ( 2 + ) ( CaV1 . 2 ) channels , the voltage - gated K ( + ) ( KV ) channels , and the large - conductance Ca ( 2 + ) - activated K ( + ) ( BK ) channels .
 Ca ( 2 + ), K ( + ), Ca ( 2 + ), K ( + )
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 Ca ( 2 + ), K ( + ), Ca ( 2 + ), K ( + )