1. TearLab Corporation, San Diego, California, USA
2. Department of Ophthalmology, Ludwig Maximilian University, Munich, Germany
3. Kentucky Lions Eye Center, University of Louisville, Louisville, Kentucky, USA
4. College of Optometry, University of Houston, Houston, Texas, USA
5. Royal Victoria Infirmary & Newcastle University, Newcastle Upon Tyne, England
6. Department of Ophthalmology, University of Dusseldorf, Germany
7. Department of Ophthalmology, Georgetown University, Washington, District of Columbia, USA
8. Department of Ophthalmology, George Washington University, Washington, District of Columbia, USA