11101
Recently, we have developed a quantitative assay using competitive reverse transcriptase polymerase chain reaction that estimates the number of AML1 /ETO transcripts in t(8;21) acute myelogenous leukemia ( AML ), in order to determine the degree of leukemic cell contamination in PBSC harvests , and to monitor minimal residual disease ( MRD ) quantitatively in patients with t(8;21) AML .
 AML1 /ETO transcripts, PBSC, AML1, reverse transcriptase polymerase
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 AML1 /ETO transcripts, PBSC, AML1, reverse transcriptase polymerase