There may be additional third-party professionals (e.g., psychologists, psychiatric social workers, or nurses) who possess materials containing private information similar to that held by doctors. The regulations are intended to cover these relationships as well. In such cases, the United States Attorney (or supervising Department of Justice attorney) should determine whether a search for such materials would involve review of extremely confidential information furnished or developed for purposes of professional counseling or treatment, and if it would, the provisions described in JM 9-19.220 for obtaining materials from physicians, lawyers, or clergymen must be followed. At a minimum, the requirements for third party search warrants described in JM 9-19.210 must be observed in all cases. 28 C.F.R. § 59.4(b)(5).