9730
We describe two patients with aspergillus arthritis of the knee joint following fludarabine - based non - myeloablative stem cell transplantation .
 aspergillus arthritis of the knee joint, fludarabine
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:
 aspergillus arthritis of the knee joint, fludarabine