1421
Demonstration of estrogen and progesterone receptors as well as Ki-67 and p-145 antigens in single tumor cells from blood and pleural effusions using a slide assay .
 cell type: single tumor cells
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 cell type: single tumor cells