20313
At the same time , the diclofenac release from the hybrid systems was substantially sustained from ~ 1day for unmodified hydrogels up to > 14days depending on the type of PACA employed as diffusion barrier .
 Chemical: diclofenac; Chemical: PACA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: diclofenac; Chemical: PACA