Many researchers say they'll share data - but don't.

@article{Watson2022ManyRS,
  title={Many researchers say they'll share data - but don't.},
  author={Clare S Watson},
  journal={Nature},
  year={2022}
}

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TLDR
The landscape of COVID-19 trials in Australia is explored, and to what extent Australian researchers have responded to global need for coordination and collaboration, to explore the number and size of trials, funding, trial purpose, study design, data sharing plans, and collection of core outcomes.
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There is a gap between high in‐principle support for data sharing, and low in‐practice intention from investigators to share data from their own clinical trials, and multiple pathways exist to bridge this gap by addressing the identified barriers to data sharing.
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Intent to share individual participant-level data from COVID-19 interventional trials is limited at a time of pressing need for researchers to work together to combat a global pandemic.
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There is a wide gap between declared and actual sharing of clinical trial data, and among the 89 articles declaring that individual-participant data would be stored in secure repositories, data from only 17 articles were found in the respective repositories as of April 10, 2020.