Study protocol for the Multiple Symptoms Study 3: a pragmatic, randomised controlled trial of a clinic for patients with persistent (medically unexplained) physical symptoms oleh Tom Sanders, Waquas Waheed, Monica Greco, Cara Mooney, Christopher D Burton, Gillian Rowlands, Steve Thomas, Jeremy Dawson, Vincent Deary, Ruth E Thomas, David Alexander White, Kate Fryer, Michelle Horspool, Aileen Neilson