“…Reflecting these findings, national treatment guidelines and classification systems have recently confirmed the legitimacy of the BPD diagnosis in adolescence (American Psychiatric Association, 2013;NICE, 2009;Tyrer, Crawford, & Mulder, 2011). Nevertheless, many clinicians remain reluctant to diagnose the disorder prior to age 18 (Griffiths, 2011;Laurenssen, Hutsebaut, Feenstra, Van Busschbach, & Luyten, 2013), meaning that adolescents manifesting BPD symptoms may be misdiagnosed (Paris, 2013) and opportunities for early intervention missed (Newton-Howes, Clark, & Chanen, 2015). Increasing awareness and understanding of the biological correlates of youth BPD may help to reduce clinical reluctance, and further our understanding of the aetiological mechanisms and pathological processes germane to the development of BPD (Goodman, Mascitelli, & Triebwasser, 2013).…”