23825
The identified Treg - promoting drugs include those previously known to induce Treg ( rapamycin and retinoic acid ) , statins , glucocorticoids and drugs in many other categories .
 Chemical: rapamycin; Chemical: retinoic acid )
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: rapamycin; Chemical: retinoic acid )