14765
METHODS : After cysteamine exposure ( range 0 - 3 . 0 mM ) during 24 h , cell viability was measured using water soluble tetrazolium salt - 1 ( WST - 1 ) in both control HDMVEC and fibroblasts .
 cysteamine, tetrazolium salt - 1
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 cysteamine, tetrazolium salt - 1