Validity of the age-of-onset criterion for ADHD: a report from the DSM-IV field trials.
Applegate B, Lahey BB, Hart EL, Biederman J, Hynd GW, Barkley RA, Ollendick T, Frick PJ, Greenhill L, McBurnett K, Newcorn JH, Kerdyk L, Garfinkel B, Waldman I, Shaffer D.
Applegate B, et al. Among authors: barkley ra.
J Am Acad Child Adolesc Psychiatry. 1997 Sep;36(9):1211-21.
J Am Acad Child Adolesc Psychiatry. 1997.
PMID: 9291722
Clinical Trial.