537
To avoid disastrous outcomes , physicians must consider heparin - induced thrombocytopenia whenever a recently hospitalized patient returns with thromboembolism ; therapy with alternative anticoagulants , not heparin , should be initiated .
 Chemical: heparin; Disease: thrombocytopenia; Disease: thromboembolism; Chemical: heparin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: heparin; Disease: thrombocytopenia; Disease: thromboembolism; Chemical: heparin