ADMINISTRATIVE LAW - RIGHT TO INFORMATION - REFUSAL OF ACCESS - CONTRARY TO THE PUBLIC INTEREST - complaints about medical treatment - accountability and transparency in a complaints process - matter of serious interest to the community - assist inquiry into conduct of agency or official - personal information of other individuals - prejudice future supply of confidential information - whether disclosure would, on balance, be contrary to the public interest - whether access to information may be refused under section 67(1) of the Information Privacy Act 2009 (Qld) and sections 47(3)(b) and 49 of the Right to Information Act 2009 (Qld)