29650
Optimized surfactants and co - surfactant combination - mediated transport of the drug through the skin was also tried and the results were shown to have facilitated drug permeation and skin perturbation ( SEM ) .
 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