For research articles, authors are also required to state in the methods section whether participants provided informed consent for participation in the study and whether the consent was written or verbal. (us.sagepub.com)
Currently a firm can not accept instructions from a new client even where there is no risk of leakage of the first client's confidential information, unless both clients provide informed consent. (newlawjournal.co.uk)
All participants provide informed consent prior to taking part in the study. (bmjopen.bmj.com)