1. Older People's External Residential Assessment Tool (OPERAT): a complementary participatory and metric approach to the development of an observational environmental measure. (December 2016) Authors: Burholt, Vanessa; Roberts, Matthew; Musselwhite, Charles Journal: BMC public health Issue: Volume 16:Number 1(2016) Page Start: 1 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗