Jonathan Flint is a Professor at the Wellcome Trust Centre for Human Genetics, Oxford University. He has extensive experience in molecular biology, molecular genetics, and rodent behavioural genetics with a specific focus on models of anxiety. Ralph Greenspan is based at the NeuroscienceInstitute in San Diego. He has studied the genetic foundations of many behaviours in Drosophila, and has analyzed naturally occurring genetic variations in its behaviour. Kenneth Kendler is a Professor at the Virginia Institute for Psychiatric and Behavioral Genetics at the Virginia CommonwealthUniversity. He has conducted family and twin studies on a range of psychiatric and drug use disorders, and has conducted gene finding studies for schizophrenia, alcoholism, and drug dependence.