The Declaration of Helsinki (2013, Article 32) declares that, "For medical research using identifiable human material or data, such as research on material or data contained in ____________ or similar repositories, physicians must seek informed consent for its collection, storage and/or reuse. There may be exceptional situations where consent would be impossible or impracticable to obtain for such research. In such situations the research may be done only after consideration and approval of a research ethics committee".