1. Division of Paediatric Ophthalmology, Strabismus, and Adult Motility, UPMC Children’s Hospital of Pittsburgh, Pittsburgh, PA, USA
2. UPMC Eye Center, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
3. Istituto Internazionale per la Ricerca e Formazione in Oftalmologia (IRFO), Italy
4. Department of Translational Medicine, University of Ferrara, Ferrara, Italy
5. Great Ormond Street Institute of Child Health, University College London, London, UK
6. University of Pittsburgh School of Medicine, Pittsburgh, PA, USA