2400
Radiation recall from gemcitabine is rare , but can potentially arise in any site that has been previously irradiated .
 Radiation recall, gemcitabine
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 Radiation recall, gemcitabine