collocation | frequency |
---|---|
stem cells | 27 |
embryonic stem | 6 |
adult stem | 5 |
liver transplant | 4 |
donor organs | 4 |
human embryos | 3 |
stem cell | 3 |
repair damaged | 3 |
cadaveric liver | 2 |
related donors | 2 |
unrelated donors | 2 |
moral controversy | 2 |
executed prisoners | 2 |
transplanting cells | 2 |
human embryonic | 2 |
give rise | 2 |
cell types | 2 |
cell transplants | 2 |
aging adult | 2 |
adult cells | 2 |
spinal cord | 2 |
retinal diseases | 2 |
growth factors | 2 |
clinical trials | 2 |
heart disease | 2 |
heart muscle | 2 |
collocation | frequency |
---|---|
embryonic stem cells | 5 |
adult stem cells | 5 |
cadaveric liver transplant | 2 |
human embryonic stem | 2 |
aging adult cells | 2 |