doi:10.1126/science.286.5439.509
Full identifier: https://doi.org/10.1126/science.286.5439.509
Searching for classes... 
Searching for instances...
Searching for templates...
References
Full identifier: https://doi.org/10.1126/science.286.5439.509
Searching for classes...
Searching for instances...
Searching for templates...