Randomized trial of a brief physiotherapy intervention compared with usual physiotherapy for neck pain patients: cost-effectiveness analysis. - Manca, Andrea; Epstein, David M; Torgerson, David J; Klaber Moffett, Jennifer A; Coulton, Simon; Farrin, Amanda J; Hahn, Seokyung; Jackson, David A; Richmond, Stewart J (International Journal of Technology Assessment in Health Care, 2006)