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Contributors DJH researched data for the article. DJH and OM-P contributed to discussion of content, writing the article and reviewing and editing the manuscript before submission.
Funding DJH is supported by a National Health and Medical Research Council (NHMRC) Practitioner Fellowship.
Competing interests DJH is a consultant to Flexion, Nestle and Merck Serono.
Provenance and peer review Not commissioned; internally peer reviewed.
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