2608
METHOD : Seventy - six participants ( 21 nonusers , 29 light ecstasy - polydrug users , 26 heavy ecstasy - polydrug users ) completed a substance use inventory and measures of psychological distress at baseline , then two consecutive days of cortisol sampling ( on awakening , 30 min post awakening , between 1400 and 1600 hours and pre bedtime ) .
 Chemical: ecstasy; Chemical: ecstasy; Chemical: cortisol
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: ecstasy; Chemical: ecstasy; Chemical: cortisol