Specifying cross-system collaboration strategies for implementation: a multi-site qualitative study with child welfare and behavioral health organizations.

"Declarations Ethics approval and consent to participateAll procedures were approved by the Ohio State University Institutional Review Board. Consent for publicationNot applicable. Competing interestsDr. Aarons is a co-Editor-in-Chief of the Implementation Science and on the Editorial Board of Implementation Science Communications. All decisions on this manuscript were made by another editor. Competing interests Dr. Aarons is a co-Editor-in-Chief of the Implementation Science and on the Editorial Board of Implementation Science Communications. All decisions on this manuscript were made by another editor."

"Funding Research reported in this publication was supported by the National Institute on Drug Abuse of the National Institutes of Health under award number R34DA046913 (Bunger, PI) and the Systems For Action program through the Robert Wood Johnson Foundation under award number ID 76434 (Bunger, PI). KEL was also supported by the National Institute on Drug Abuse through K01DA048174 (Lancaster, PI). BJP was supported by the National Institutes of Health through K01MH113806, R01CA262325, and R25MH080916. LS was supported by the National Institutes of Health through the NIH HEAL Initiative under award number UH3DA050193. GAA was supported in part by the National Institute on Drug Abuse R01DA049891 (Aarons, PI), National Institute of Mental Health P50MH126231 (Brookman-Frazee & Aarons, MPIs), Fogarty International Center (Aarons & Ezeanolue, MPIs), and National Cancer Institute U01CA275118 (Aarons & Ezeanolue, MPIs). The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health or its NIH HEAL Initiative."