12891
Hence , the question ' what ' s next after LC - MS / MS or ELISA ? ' is not resonating with many scientists as pertinently compared with ' What ' s next after RIA , GC or LC - UV ? ' , which was the key question in the 1990s , certainly in the context of an increasing effort needed to validate these new tools .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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