source studies Blood 101 Cultured cells 32 Liver 17 Feces 12 Bacterial cells 10 Cerebrospinal fluid 9 Urine 9 Kidney 9 CSF 9 Unspecified 8 Muscle 7 Heart 5 Cecum 4 Plant 3 Intestine 3 Lung 3 Gastrocnemius 2 Eye tissue 2 Amniotic fluid 2 Ovarian cancer cells 2 White adipose 2 Brain 2 Insect tissue 1 Hep G2 cells 1 Colon 1 Erythrocytes 1 Cells 1 Bovine meat 1 Endothelial cells 1 Eggs 1