10399
In postmenopausal patients with ER + BC adjuvant treatment with AIs should be performed , either as sequential treatment after tamoxifen or as upfront therapy .
 Chemical: tamoxifen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: tamoxifen