6949
Immune parameters , natural killer cell and T lymphocyte functions and the numbers of circulating T lymphocytes were analysed against the clinical parameters comprising the tumour burden, the stage of the disease and the expression of hormone receptors on the tumour.
 ( protein: hormone receptors, None) , ( cell type: circulating T lymphocytes, None) , ( cell type: natural killer cell, None) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: RNA,cell type,protein,cell line,DNA, Arguments type: . 
Text: {0} 
Answer:
 ( protein: hormone receptors, None) , ( cell type: circulating T lymphocytes, None) , ( cell type: natural killer cell, None) 