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Postthrombectomy continuous CDT with alteplase was commenced while argatroban was withheld , and complete patency of the SVC and central veins was achieved after three days of therapy .
 Chemical: argatroban
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: argatroban