1. Department of Ophthalmology, Centro Hospitalar Universitário de Santo António, Porto, Portugal
2. Department of Biomedicine - Unit of Anatomy, Medicine of University of Porto, Porto, Portugal
3. Centre for Health Technology and Services Research, Health Research Network (CINTESIS@RISE), Medicine of the University of Porto, Porto, Portugal
4. Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal