Media type: E-Article Title: Physical Activity and Psychiatric Problems in Children Contributor: Martikainen, Silja; Pesonen, Anu-Katriina; Lahti, Jari; Heinonen, Kati; Tammelin, Tuija; Kajantie, Eero; Eriksson, Johan; Strandberg, Timo; Räikkönen, Katri imprint: Elsevier BV, 2012 Published in: The Journal of Pediatrics Language: English DOI: 10.1016/j.jpeds.2012.03.037 ISSN: 0022-3476 Keywords: Pediatrics, Perinatology and Child Health Origination: Footnote: