Publication Correction

The correction was limited to the study design description in the title and did not affect other parts of the article. The article has been updated since first publication to reflect the corrected multicentre description. BMJ Open issued a correction for the LUMO study article, specifically addressing the wording of the study design in the title. The error in the title arose because the word 'multi' was omitted, leaving 'a centre' as the erroneous description of the study structure. The original title incorrectly described the study as 'a centre, randomised, double-blind, controlled trial' rather than a multicentre trial.