Unfortunately you can't use this method to confirm a finding because the conditions under which it works only happen once.

The authors of the latest report were unable to confirm this finding, 'mostly because a considerable number of patients preferred to keep obscure the circumstances involving the incident'.

The second diver can join him to confirm the finding and mark it or continue the search.

Genetic testing suggested it was a distinct species, but additional evidence was needed to confirm the finding.

The researchers are now seeking to confirm the findings among a group of 65-year-olds.