Impact of a program to prevent incivility towards and assault of healthcare staff in an ophtalmological emergency unit: study protocol for the PREVURGO On/Off trial. - Touzet, Sandrine; Cornut, Pierre-Loïc; Fassier, Jean-Baptiste; Le Pogam, Marie-Annick; Burillon, Carole; Duclos, Antoine (BMC Health Services Research, 2014)