The idea for this book developed during the course of several discussions among the editors while we were working together as staff scientists in the laboratories of the Clinical Neuro science Branch of the National Institute of Mental Health. It was a happy coincidence that the three of us, child psychiatrists with predominantly clinical interests, selected a collaborative bench research project involving neurotransmitter receptor characterization and regulation. We appreciated the relevance of our work to child psychiatry and wished for a forum to share the excitement we enjoyed in the...