Sheppard, J. P., Martin, U., Gill, P., Stevens, R., Hobbs, F. R., Mant, J., Godwin, M., Hanley, J., McKinstry, B., Myers, M., Nunan, D., & McManus, R. J. (2018). Prospective external validation of the Predicting Out-of-OFfice Blood Pressure (PROOF-BP) str