4435
After adjusting for confounding factors , the risk was higher for tamoxifen users ( p = 0 . 0012 ) , treatment for more than 3 years ( all p < 0 . 03 ) and pelvic radiotherapy ( p = 0 . 012 ) .
 Chemical: tamoxifen
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: tamoxifen