1846
Despite these antithrombotic effects , the patient developed repeated venous thromboembolism during treatment with low - molecular - weight heparin .
 venous thromboembolism, heparin
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:
 venous thromboembolism, heparin