Catatonic features in adolescents with schizophrenia with and without a comorbid pervasive developmental disorder
Child and Adolescent Psychiatry and Mental Health (2014) - Comment
pubmed: 24914405  doi: 10.1186/1753-2000-8-16  issn: 1753-2000 

Petra Waris, Nina Lindberg, Kirsi Kettunen, Jari Lipsanen, Pekka Tani