816
Here , we investigated the effects of mGluR ( 2 / 3 ) stimulation on cue - and drug - primed reinstatement in rats with different histories of methamphetamine ( METH ) self - administration training , under two conditions : 16 daily sessions of short access ( 90 min / day , ShA ) , or 8 daily sessions of short access followed by 8 sessions of long access ( 6 h / day , LgA ) .
 Chemical: methamphetamine; Chemical: METH
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: methamphetamine; Chemical: METH