Development of a management algorithm for post-operative pain (mapp) after total knee and total hip replacement: study rationale and design M. Botti, B. Kent, T. Bucknall, M. Duke, M. Johnstone, J. Considine, B. Redley, S. Hunter, R. De Steiger, M. Holcombe, E. Cohen 2014 / Vol. 9, pp. 1 - 11 / Implementation science