“…Three were reviews [ 242 , 245 , 252 ]. Most studies were set in psychiatric hospitals (n = 20) [ 176 , 177 , 181 – 183 , 185 – 189 , 198 , 200 – 202 , 206 , 217 , 243 , 244 , 247 , 255 ] or elderly care homes (n = 12) [ 174 , 191 – 193 , 195 , 196 , 199 , 203 – 205 , 207 , 209 ]. Other settings included acute and other hospitals (n = 4) [ 118 , 178 – 180 ], intensive care units (ICU) or emergency units (n = 11) [ 175 , 196 , 197 , 212 , 246 , 248 – 250 , 251 , 253 , 254 ], children’s care homes (n = 2) [ 184 , 190 ] and a residential camp (n = 1) [ 210 ].…”