1231
We report four cases of hemodynamically significant pericardial effusion in patients with refractory lymphoma who were receiving gemcitabine , all of whom had a history of mediastinal radiation without subcarinal blocking .
 pericardial effusion, 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:
 pericardial effusion, gemcitabine