14352
Genotype at rs16969968 predicted nicotine titration , with homozygotes for the major allele ( G : G ) displaying significantly reduced puff volume in response to nicotine , whereas minor allele carriers ( A : G or A : A ) produced equivalent puff volumes for placebo and nicotine cigarettes .
 Chemical: nicotine; Chemical: nicotine; Chemical: nicotine
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: nicotine; Chemical: nicotine; Chemical: nicotine