Extension of the CONSORT and SPIRIT statements

Affiliations

• ¹ Academic Unit of Ophthalmology, Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK.
• ² Cantonal Hospital of Lucerne, Lucerne, Switzerland.
• ³ Centre for Patient Reported Outcomes Research, Institute of Applied Health Research, University of Birmingham, Birmingham B15 2TT, UK.
• ⁴ Academic Unit of Ophthalmology, Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK. Electronic address: [email protected].