Written informed consent was obtained from each subject, prior to participation.

This study received approval from our local Ethical Committee and all patients provided written, informed consent.

Written informed consent was obtained from all patients.

Written informed consent was obtained from each patient before the study.

These laws required extensive counseling and written informed consent that, although burdensome for health care providers, offered vital protections in the epidemic's early days.

Written informed consent was obtained from all individuals tested.

Written informed consent was obtained from each patient before enrolment.

I had written consent from the copyright owner to pr...

Written informed consent is obtained for every study subject.

Written informed consent was obtained from the patient's next of kin.