The authors of the original study stood by their work.

The authors of the study said they did not know the reason for this difference.

Patients are back to normal activity within two weeks, the study authors write.

The study authors must have known they were building a test most people would fail.

Further information is available to download by the authors of the study.

The authors of the new study said the risks had to be kept in perspective.

The study authors questioned whether the differences in only one age group were chance findings.

Medical records were not available to the authors of the study; information came from patient interviews.

The authors of the study said they hoped the results would help women make a more informed choice.

The authors of the study said there were too few patients in the trial to resolve the safety issue.