1. Ophthalmology Department, Hospital de Braga, Braga, Portugal
2. Life and Health Sciences Research Institute (ICVS), School of Health Sciences, University of Minho, Braga, Portugal
3. Instituto Universitario Fernández-Vega, Fundación de Investigación Oftalmológica, Universidad de Oviedo, Oviedo, Spain
4. Rio de Janeiro Corneal Tomography and Biomechanics Study Group, Rio de Janeiro, Brazil
5. Department of Ophthalmology, Federal University of São Paulo, São Paulo, Brazil
6. Optometry and Vision Department, Faculty of Optics and Optometry, Universidad Complutense de Madrid, Madrid, Spain