2170
Type II heparin - induced thrombocytopenia ( HIT ) is an immunological disorder characterized by antibodies to heparin - platelet factor 4 complexes and a high risk of thrombotic complications .
 thrombocytopenia, 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:
 thrombocytopenia, heparin