In case you missed it, our ISSOP colleagues published a comment in The Lancet Child and adolescent health. The access is free, but you need to login or create an account.

Goldhagen JL, Kadir A, Fouad FM, Spencer NJ, Raman S. The Budapest declaration for children and youth on the move. The Lancet Child & Adolescent Health [Internet]. 1 mars 2018 [cited 9 mars 2018];2(3):164‑5.  http://www.thelancet.com/journals/lanchi/article/PIIS2352-4642(18)30030-0/abstract