Kimball 2018.

Study characteristics
Methods	Retrospective multi‐centre database review cohort January 2010 to March 2017 Optum ClinformaticsTM DataMart, Eden Prairie, MN, USA) 18,251 participants
Participants	Inclusion: Women with breast cancer undergoing breast‐conserving surgery Exclusion: Patients were excluded if they underwent: lumpectomy mastectomy reconstruction procedure in the prior year
Interventions	Intervention: Volume displacement ‐ lumpectomy & mammoplasty &/or mastopexy, (n = 709) Control: BCS: wide local excision, (n = 17,542)
Outcomes	Primaryoutcomes: No outcomes of interest Secondaryoutcomes: Complications Time to adjuvant treatment
Notes	Declarations: 2 of the authors were employees of Medtronic and one was a paid consultant, but for services unrelated to this present research Funding: Medtronic provided funds for professional medical writing but had no influence on study design and manuscript preparation