Opioids for back and neck pain: the OPAL trial - Authors' reply

Affiliations

• ¹ Sydney Musculoskeletal Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia; The Institute for Musculoskeletal Health, Sydney Local Health District, Sydney, NSW, Australia.
• ² Department of Clinical Pharmacology and Toxicology, St Vincent's Hospital Sydney and St Vincent's Clinical Campus, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
• ³ Department of General Practice, Erasmus MC, Rotterdam, Netherlands; Center for Muscle and Joint Health, University of Southern Denmark, Odense, Denmark.
• ⁴ Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia.
• ⁵ The George Institute for Global Health, Faculty of Medicine, University of New South Wales, Sydney, NSW, Australia.
• ⁶ Sydney Musculoskeletal Health, Faculty of Medicine and Health, The University of Sydney, Sydney, NSW 2050, Australia; The Institute for Musculoskeletal Health, Sydney Local Health District, Sydney, NSW, Australia. Electronic address: christine.lin@sydney.edu.au.