“…In older children, this CBCL profile has been associated with juvenile bipolar disorder (Ayer et al, 2009; Biederman et al, 2009; Faraone, Althoff, Hudziak, Monuteaux, & Biederman, 2005; Mick, Biederman, Pandina, & Faraone, 2003; Papolos, Hennen, Cockerham, Thode, & Youngstrom, 2006). Some evidence suggests that early onset bipolar disorder may be identifiable also at preschool age (Danielyan, Pathak, Kowatch, Arszman, & Johns, 2007; Dilsaver & Akiskal, 2004; Ferreira Maia, Boarati, Kleinman, & Fu-I, 2007; Luby & Belden, 2006; Luby, Tandon, & Belden, 2009; Scheffer & Niskala Apps, 2004). However, studies largely differ in methodology, sample size, age range, and psychiatric assessment, raising major controversy in the field.…”