1 Geneva University Hospitals, 1205 Geneva, Switzerland; Laboratory of Geographic Information Systems, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
2 Geneva University Hospitals, 1205 Geneva, Switzerland.
3 Geneva University Hospitals, 1205 Geneva, Switzerland; Laboratory of Geographic Information Systems, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland. Electronic address: [email protected].