9996
Our experimental and computational approaches for investigating the diffusion through skin strata help in the assessment and optimization of controlled delivery of drugs ( e . g . vaccines ) to specific sites ( e . g . antigen presenting cells ) .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None