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subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0304-3959(07)00313-2
Child Mental Health free resource MedlinePlus Health Information https://medlineplus.gov/childmentalhealth.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=17689865.ui
free resource PubMed Central https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/17689865/
free resource Europe PubMed Central https://europepmc.org/abstract/MED/17689865
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1016/j.pain.2007.06.011