18610
Methods : Ten depressed patients were treated with twice weekly ketamine infusions of ketamine 0 . 5 mg / kg administered over 100 min until either remission was achieved or four infusions were given .
 Chemical: ketamine; Chemical: ketamine
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: ketamine; Chemical: ketamine