Footnotes

• X @DrPuligandla, @GuadagnoElena, @CardioNeo

• Collaborators The Canadian Congenital Diaphragmatic Hernia Collaborative.

• Contributors A three-member steering committee (PP, ES, RB) was formed to oversee the CDH Collaborative’s guideline development process, to finalise the guideline panel membership and contributors to the literature reviews, to critically appraise all materials generated during the evidence review process, oversee the final guidelines endorsement process and prepare the manuscript. PP acted as guarantor. They were specifically involved in the preparation of sections on haemodynamics (PP), ECLS (RB), non-primary surgical repair (ES), type of surgical repair (ES), repair on ECLS (ES/PP), and pain control and analgesia (ES). EG was the research director for the project who oversaw its design, the literature search and screening, as well as the editing of the final revised version of the manuscript and supplemental materials. AD was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on surgery on ECLS, as well as the revision of the final submitted manuscript. OG was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on haemodynamics, as well as the revision of the final submitted manuscript. NA was involved with the critical appraisal and preparation of the sections on prenatal diagnosis and fetal therapy, as well as revision of the final submitted manuscript. GA was involved with the literature search and abstract screening, the critical appraisal and preparation of the sections on echocardiography, role of PGE and target pulmonary vasodilator therapy, as well as the revision of the final submitted manuscript. MB was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on surgical readiness, as well as the revision of the final submitted manuscript. SF was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on type of surgical repair, as well as the revision of the final submitted manuscript. SD was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on ventilation, as well as the revision of the final submitted manuscript. HF was involved with the critical appraisal and preparation of the section on gastro-oesophageal reflux as well as the revision of the final submitted manuscript. AH was involved with the literature search and abstract screening, the critical appraisal and preparation of the sections on echocardiography, role of PGE and target pulmonary vasodilator therapy, as well as the revision of the final submitted manuscript. RK was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on ECLS as well as the revision of the final submitted manuscript. MO was involved in the concept and design of the work, as the facilitator for our Delphi consensus process, as well as the revision of the final submitted manuscript. DP was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on role of ECLS, as well as the revision of the final submitted manuscript. GR was involved with the critical appraisal and preparation of the sections on prenatal diagnosis and fetal therapy, as well as the revision of the final submitted manuscript. MT was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on ventilation, as well as the revision of the final submitted manuscript. AZ was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on ECLS as well as the revision of the final submitted manuscript. PC was involved with the literature search and abstract screening, the critical appraisal and preparation of the section on long-term follow-up, as well as the revision of the final submitted manuscript.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

• Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.