1923
INTRODUCTION: Although gefitinib used for the treatment of non-small-cell lung cancer is a well-known cause of interstitial lung disease (ILD), few case reports on erlotinib-induced ILD have been issued.
 adverse event: cause 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: cause 