source	studies
Blood	15
Bacterial cells	7
Cultured cells	6
Feces	6
Liver	4
Cells	4
Intestine	3
Muscle	3
Urine	3
Plant	2
Yeast cells	2
Brain	2
Leaves	1
Bee heads	1
Keratinocytes	1
Kidney	1
Amniotic fluid	1
Lung	1
Milk	1
Pancreas	1
Sputum	1
Tissue	1
Whole Tissue	1