You will be shown an abstract from a biomedical research paper. Given this abstract, your task is to extract all unique entities of the following types: ["RNA", "CellLine", "Protein", "DNA", "CellType"].

Please return the output as a JSON object of the format: {"DNA" : ["TAL1", ...], "RNA": ["mRNAs", ...], "CellLine": ["T cells", ...], "CellType": ["monocytes", ...], "Protein": ["IL-2", ...]}. The keys should be entity types and values should be lists of extracted entities belonging to the corresponding type. If you cannot find entities belonging to a specific type, the value should be [].

Only output the JSON object and do not include any additional text.

Abstract:

Glucocorticoid receptors in normal leukocytes: effects of age, gender, season, and plasma cortisol concentrations. We measured glucocorticoid receptors (GR) in mononuclear leukocytes (MNL) isolated from peripheral blood of 145 apparently healthy volunteers (86 men and 59 women). An age-related decrease in the number of GR was suggested between subjects younger than 20 years and elderly subjects; there was no apparent seasonal variation in GR. Gender difference in the number of GR was not significant, although women showed slightly fewer GR. Eight patients with dermatomyositis / polymyositis were examined to determine whether the number of GR in MNL could be down-regulated by their cognate ligands. The number of GR in MNL from these patients was significantly decreased one month after the initiation of prednisolone therapy. However, in normal subjects, the GR in MNL did not demonstrate circadian variation, in contrast to concentrations of plasma cortisol.
{"CellLine": [], "CellType": ["MNL", "mononuclear leukocytes", "normal leukocytes"], "DNA": [], "Protein": ["Glucocorticoid receptors", "glucocorticoid receptors (GR)", "the GR", "glucocorticoid receptors", "GR"], "RNA": []}