1633
According to annexin V binding , erythrocytes from patients indeed showed a significant increase of PS exposure within 1 week of treatment with azathioprine .
 Chemical: PS; Chemical: azathioprine
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: PS; Chemical: azathioprine