The team at the German Paediatric Pain Centre have recently published a pre-registered systematic review and individual patient data meta-analysis on intensive interdisciplinary pain treatment for children and adolescents in PAIN, https://journals.lww.com/pain/Abstract/9900/Intensive_interdisciplinary_pain_treatment_for.14.aspx.  The group has also created a website,  https://www.peds-iipt.com, to publish the results of the qualitative analysis of their paper.