2408
This was achieved by examining effects in non - consumers ( N = 35 ) , who could not be withdrawn , and also in a group of consumers ( N = 35 ) who had undergone withdrawal for a week and no longer reported symptoms of withdrawal .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None