Ranger, T. A., Burchardt, J., Clift, A. K., Mei, W. X., Coupland, C., Tan, P. S., Dixon, S., Cardwell, C. R., & Hippisley-Cox, J. (2021). Hormone replacement therapy and cancer survival: a longitudinal cohort study: protocol paper. BMJ Open, 11(8), Article e046701. https://doi.org/10.1136/bmjopen-2020-046701