Title {1}	Group intervention for siblings and parents of children with chronic disorders (SIBS-RCT): Study protocol for a randomized controlled trial
Trial registration {2a and 2b}.	ClinicalTrials.gov. Project identifier: NCT04056884
Protocol version {3}	Version 1; September 2019
Funding {4}	Internal funding by the main project organizers: Department of Psychology, University of Oslo, Norway: and Frambu Resource Centre for rare disorders, Norway. In-kind contributions from intervention sites (i.e., no major external funding sponsor).
Author details {5a}	Department of Psychology, University of Oslo, Norway, and Frambu Resource Centre for rare disorders, Norway.
Name and contact information for the trial sponsor {5b}	Department of Psychology, University of Oslo, Po Box 1094 Blindern, 0317 Oslo, Norway. joakim.dyrnes@psykologi.uio.no Frambu Resource Centre for rare disorders, Sandbakkveien 18, 1404 Siggerud, Norway. krk@frambu.no National Advisory Unit for Rare Disorders, Oslo University Hospital, Kirkeveien 166, Oslo, Norway. sjeldne-diagnoser@ous-hf.no
Role of sponsor {5c}	The sponsors are jointly responsible for design, data collection, data analyses and results dissemination. All contributing intervention sites can use their own data, after agreement with the project management.