Renal Adverse Events Associated With Ibuprofen Treatment After Hip and Knee Arthroplasties— <i>A Protocol for the Preplanned Substudy of the PERISAFE Trial</i>

The ethical approval for this substudy is included in the main PERISAFE trial, which has been approved by the Danish Medicine Agency, the National Committee on Health Research Ethics (EU CT no. 2022-502502-32-00), and the Danish Data Protection Agency (REG-149-2022).