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Addition of human recombinant interleukin 6 ( IL - 6 ) to culture medium ( supplemented MEM without or with 10 % fetal calf serum ( FCS ) ) of human skin fibroblasts exerted a stimulating effect in a dose - dependent manner on glycosaminoglycan ( GAG ) synthesis , including hyaluronic acid ( hyaluronan ) synthesis , of young ( phase - II ) skin fibroblasts in concentrations of 1 ng / ml and 10 ng / ml .
 Anatomy: fetal calf serum; Anatomy: FCS; Anatomy: skin fibroblasts; Anatomy: skin 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: fetal calf serum; Anatomy: FCS; Anatomy: skin fibroblasts; Anatomy: skin fibroblasts