15923
We suggest that the ability of roflumilast and formoterol to interact in this way supports the concept that these drugs together may impart clinical benefit beyond that achievable by an ICS alone , a PDE4 inhibitor alone , or an ICS / LABA combination therapy .
 Chemical: roflumilast; Chemical: formoterol
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: roflumilast; Chemical: formoterol