1 Department of Glaucoma, Hospital Universitari Vall d'Hebron, Passeig de la Vall d'Hebron, 119, 08035 Barcelona, Spain. Electronic address: xgarrell@vhebron.net.
2 Department of Glaucoma, Hospital Universitari Vall d'Hebron, Passeig de la Vall d'Hebron, 119, 08035 Barcelona, Spain.