4485
There is a statistically significant reduction of breast cancer among women receiving tamoxifen who also used hormone - replacement therapy during the trial : among 390 women on such therapy and allocated to placebo , we found eight cases of breast cancer compared with one case among 362 women allocated to tamoxifen .
 Disease: breast cancer; Chemical: tamoxifen; Disease: breast cancer; 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:
 Disease: breast cancer; Chemical: tamoxifen; Disease: breast cancer; Chemical: tamoxifen