Correction: OPAL: a randomised, placebo-controlled trial of opioid analgesia for the reduction of pain severity in people with acute spinal pain-a statistical analysis plan
1 Institute for Musculoskeletal Health, Sydney Local Health District and The University of Sydney, Level 10N, KGV Building, Missenden Road, Camperdown, Sydney, NSW, Australia. caitlin.jones@sydney.edu.au.
2 Institute for Musculoskeletal Health, Sydney Local Health District and The University of Sydney, Level 10N, KGV Building, Missenden Road, Camperdown, Sydney, NSW, Australia.
3 Department of Clinical Pharmacology & Toxicology, St Vincent's Hospital Sydney and St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
4 Department of General Practice, Erasmus MC, Rotterdam, The Netherlands.
5 Faculty of Pharmacy and The Centre for Education and Research On Ageing (CERA), The University of Sydney and Concord Hospital, Sydney, NSW, Australia.
6 The George Institute for Global Health, Faculty of Medicine, University of New South Wales, Sydney, Australia.