While the exterior of vertebrate bodies appears bilaterally symmetrical, internal organ positioning and morphology frequently exhibit left-right (L-R) asymmetries. In several vertebrates, including ...

Correspondence to: Dr P T G Elkington Department of Infectious Diseases, Imperial College, Hammersmith Hospital, Du Cane Road, London W12 0NN, UK; p.elkington{at}imperial.ac.uk Matrix ...