1374
CONCLUSION : The 4 - mg nicotine lozenge and 4 - mg nicotine gum had comparable safety profiles in these patients with label - restricted medical conditions .
 nicotine, nicotine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 nicotine, nicotine