Searching for 3Rs
Searching for 3Rs methods may feel like looking for a needle in a haystack. There is a lot of information available, so defining a good search strategy is crucial. Take your time to do so, and make sure to document what you are doing.
Do not limit yourself by being too precise on subjects as species and organs, but also allow for hits on processes (such as barrier formation, extravasation etc). You may just find what you were looking for, or maybe come up with new ideas yourself.