1693
We report on a 14-year - old boy with severe haemophilia A who developed a portal vein thrombosis during continuous infusion of F VIII .
 portal vein thrombosis, F VIII
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:
 portal vein thrombosis, F VIII