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The effects of 1 alpha, 25-dihydroxyvitamin D3 ( VD3 ) on proliferation , differentiation , and macromolecular synthesis in the new Philadelphia chromosome-positive chronic myelogenous leukemia cell line , RWLeu-4 , were investigated.
 cell line: RWLeu-4; cell line: Philadelphia chromosome-positive chronic myelogenous leukemia cell line
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 line: RWLeu-4; cell line: Philadelphia chromosome-positive chronic myelogenous leukemia cell line