3264
Although its side effects are few , tamoxifen increases the incidence of proliferative lesions of the endometrium , which theoretically should be preventable with progestational agents .
 proliferative lesions of the endometrium, tamoxifen
Please list all entity pairs containing a certain relationship in the given options.Output format is "word1, word2; word3, word4". 
Option: adverse effect 
Text: {0} 
Answer:
 proliferative lesions of the endometrium, tamoxifen