Published on in Vol 21 , No 7 (2019) :July
Preprints (earlier versions) of this paper are
available at
https://preprints.jmir.org/preprint/10876, first published
.

1 Section of Eating Disorders, Institute of Psychiatry, Psychology, and Neuroscience, King’s College London, London, GB
2 The Eating Disorders Service, Maudsley Hospital, South London & Maudsley National Health Service Foundation Trust, London, GB