“…Pediatrics 2014;133:e592-e600 Dr Kashikar-Zuck (principal investigator) designed and conceptualized the study, drafted the manuscript, supervised all aspects of the implementation of the study, consolidated manuscript revisions from all coauthors, and submitted the final document; Dr Cunningham (postdoctoral fellow) conducted the study assessments, assisted in the interpretation of findings, drafted portions of the initial manuscript, and critically reviewed/revised the manuscript; Dr Sil (postdoctoral fellow) conducted the study assessments, assisted in the interpretation of findings, drafted portions of the initial manuscript, and critically reviewed/revised the manuscript; Dr Bromberg (psychology resident) conducted the literature review for the manuscript, drafted portions of the manuscript, and critically reviewed/revised the manuscript; Dr Lynch-Jordan (coinvestigator) provided clinical supervision for the psychological assessments, monitored safety and risk of study participants, assisted with conceptualizing the focus of the manuscript, and critically reviewed/revised the manuscript; Mr Strotman (clinical research coordinator) managed all aspects of data collection, data entry, data cleaning, initial analysis, and preparation of tables and figures for the manuscript; Dr Peugh (study biostatistician) completed all statistical analyses for the manuscript, wrote the analysis plan and assisted with the interpretation of data for the results section, and critically reviewed/revised the manuscript; Dr Noll (coinvestigator and developmental psychologist) assisted in the conceptualization and design of the study and selection of instruments, provided guidance on retention strategies for this long-term study, and critically reviewed/revised the manuscript; (Continued on last page) Chronic widespread musculoskeletal pain in childhood is common, affecting 6% to 7% of school-aged children, [1][2][3][4] and often encountered in pediatric primary care. [5][6][7] For a subset of patients, usually adolescent females, symptoms initially viewed by physicians and parents as temporary "growing pains" may be persistent (beyond 3 months), accompanied by headaches, fatigue, and sleep difficulties, and be medically unexplained. Furthermore, high levels of physical impairment, school absences, and emotional distress are reported, [8][9][10][11] often prompting families to seek medical attention.…”