Predictors and variation in preoperative anaemia: A quality metric performance review

AM is a member of speaker bureaus and advisory boards for AbbVie, Allergan, Bayer and Hologic and a member of the speaker bureau for Medtronic. The remaining authors declare no conflicts of interest. Completed disclosure of interest forms are available to view online as supporting information. The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions. Appendix S1 Appendix S2 Appendix S3 Appendix S4 Appendix S5 Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.