1. Prospective data collection As part of the ongoing registry, data are prospectively recorded in duplicate on standardized forms designed to facilitate data collection and entry. All completed forms are forwarded to the core coordinating facility of the regional emergency system (RENAU=Réseau Nord-Alpin des Urgences ; www.renau.org), where the data are entered electronically (single-data entry) and maintained on a local computer network. The data entry screens are similar to the paper forms. Original data collection forms are kept in locked file cabinets.