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The diminished response of GAG - and hyaluronic acid synthesis during aging of these in vitro cultured fibroblasts should motivate further research if similar processes occur during aging in an organism .
 Anatomy: fibroblasts
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: fibroblasts