3190
This study aims to systematically investigate the effect of constant voltage iontophoresis in the transungual drug delivery , using ciclopirox as a model drug .
 Chemical: ciclopirox
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: ciclopirox 
Answer:
 Chemical: ciclopirox