22952
The objective of this study was to prepare and evaluate in situ forming gel systems designed by combination of two poloxamers ( P407 and P188 ) and hydroxypropylmethylcellulose ( HPMC ) for prolonged release of heparin .
 Chemical: poloxamers ( P407 and P188 )
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: poloxamers ( P407 and P188 )