1844
What was observed , however , was the multistep acquisition of aberrant cellular genetic changes in marrow cells from patients who transformed , including activating ras oncogene mutations , clonal cytogenetic abnormalities , and G - CSF receptor mutations .
 cellular, marrow cells
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 cellular, marrow cells