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In order to inquire into the functional state of adrenal cortex in patients with pulmonary heart disease , the number of glucocorticoid receptors ( GCR ) of peripheral blood leukocytes in patients with chronic pulmonary heart disease was determined with radioligand-binding assay and the corresponding plasma cortisol levels were assessed with radioimmune assays .
 ( protein: glucocorticoid receptors, None) , ( protein: GCR, None) , ( cell type: peripheral blood leukocytes, 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: glucocorticoid receptors, None) , ( protein: GCR, None) , ( cell type: peripheral blood leukocytes, None) 