Authors: Jonathan Hammond; Katja Gravenhorst; Emma Funnell; Susan Beatty; Derek Hibbert; Jonathan Lamb; Heather Burroughs; Marija Kovandžić; Mark Gabbay; Christopher Dowrick; Linda Gask; Waquas Waheed; Carolyn A Chew-Graham Journal: Br J Gen Pract Date: 2013-03 Impact factor: 5.386