Me. Rev. Stat. tit. 32, § 18307

A dentist who is a member of a peer review committee of a state or local association or society composed of doctors of dentistry, a staff member of such an association or society assisting a peer review committee and a witness or consultant appearing before or presenting information to the peer review committee are immune from civil liability for, without malice, undertaking or failing to undertake any act within the scope of the function of the committee.