In cases before CAS, at WADA’s request, the CAS  panel sha ll appoint an appropriate scientific expert to assist the panel in its ev aluation of the challenge.13  3.2.2   WADA- accredited laboratories, and other laboratories approved by WADA, are presumed to have conducted Sample analysis and custodial procedures in   [Comment to Article 2.11.2: Retaliation would include, for example, actions that threaten the physical or mental well -being or economic interests of the reporting Persons, their families or associates.