Ethics approval
This letter reports a reanalysis of previously published data. No new participants were recruited or identified, so no human subject approval was sought.
Consent to participate
This letter reports a reanalysis of previously published data. No new participants were recruited or identified, so there was no one from whom to seek consent to participate.
Consent for publication
This letter reports a reanalysis of previously published data. No new participants were recruited or identified, so there was no one from whom to seek consent to publish.
Conflict of interest
The author declares no competing interests.