3897
The present study was undertaken to examine the role of sleep disturbance , induced by clomipramine administration , on the secretory rate of prolactin ( PRL ) in addition to the direct drug effect .
 sleep disturbance, clomipramine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 sleep disturbance, clomipramine