Discuss the importance of the age of onset distinction for Conduct Disorder

Please note that this essay should be straight to the point as it is short (400-450 words) and should be formulated as a summary of the research and evidence behind the importance of the age of onset distinction. The more references the better! The intro and conclusions do not have to be lengthy the most important is developing the rationale & evidence. The intro is to get into the subject (what is conduct disorder) and conclusion to quickly sum up in 3 lines what was said. Please do use a critical approach (if the study is outdated or uses a small sample or has been vividly criticised please mention it as it always adds some level of ‘critique’ to the core of the essay) The sentences do not have to be incredibly well written/structured because I can work on that, however, it is important to articulate the arguments and reference them along the way. Thank you very much (a reference you might want to use: Frick, P. J., & Nigg, J. T. (2012). Current issues in the diagnosis of attention deficit hyperactivity disorder, oppositional defiant disorder, and conduct disorder. Annual Review of Clinical Psychology, 8, 77. )