source	studies
Blood	27
Cultured cells	13
Liver	9
Unspecified	6
Eye tissue	3
Muscle	3
Brain	3
Kidney	2
Heart	2
Lung	2
Adipose tissue	2
Breast cancer cells	2
Colon	2
LNCaP cells	2
Ventricles	1
Atria	1
Cyst fluid	1
Epithelial cells	1
Hep G2 cells	1
Hippocampus	1
Keratinocytes	1
Pancreas	1
Spinal cord	1
Stem cells	1
Tumor cells	1