717
Low - molecular - weight heparin ( LMWH ) offers theoretical advantages over UH , but is not currently considered in clinical guidelines as an alternative to UH in patients with prosthetic valves .
 Chemical: Low - molecular - weight heparin; Chemical: LMWH; Chemical: UH; Chemical: UH
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: Low - molecular - weight heparin; Chemical: LMWH; Chemical: UH; Chemical: UH