title: Drs. Althoff and Williamson reply.
authors.affiliation: University of Vermont College of Medicine, Burlington, VT. Electronic address: robert.althoff@med.uvm.edu.
authors.forename: Robert R
authors.initials: RR
authors.lastname: Althoff
authors.forename: Genevieve
authors.initials: G
authors.lastname: Williamson
mesh_terms: D001714:Bipolar Disorder / Q000145:classification / Q000175:diagnosis*; D001873:Book Reviews as Topic; D002648:Child; D006801:Humans