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Preclinical toxicologic investigation suggested that a new calcium channel blocker , Ro 40 - 5967 , induced cardiovascular alterations in rat fetuses exposed to this agent during organogenesis .
 calcium, Ro 40 - 5967, cardiovascular alterations
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 calcium, Ro 40 - 5967, cardiovascular alterations