All subjects gave informed consent for the study, which was approved by the local ethical committee.

The protocols for the trials were approved by the ethical committee.

The local ethical committee's approval and patients' informed consent were obtained for the study.

The study was approved by the local ethical committee.

The latter procedure was in agreement with the recommendations from the local ethical committee.

The study protocol was approved by the ethical committee of our hospital.

This study was approved by the ethical committee of the hospital.

This is exactly the kind of question that ought to be put to such an ethical committee.

That being the case, we need to establish and ethical committee.

We do not even have a basic ethical committee.