2153
Under conditions mimicking the injection environment , the lipoplex - serum interaction was strongly dependent on helper lipid and ionic strength : lipoplexes prepared in 150 mM NaCl or lipoplexes with high ( greater than 33 mol % ) cholesterol were found to aggregate immediately .
 Anatomy: serum
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
 Entities: serum 
Answer:
 Anatomy: serum