BC	Breast Cancer
CDK4i and CDK6i	Cyclin-dependent kinases 4 and 6 inhibitors
CI	Confidence interval
CHUV	Lausanne University Hospital
CONSORT	Consolidated Standards of Reporting Trials
COVID	Coronavirus Disease
CRF	Case Report Form
EMERGE	ESPACOMP Medication Adherence Reporting Guideline
GEE	Generalized estimating equation
HCPs	Health care providers
HR+/HER2−	Endocrine-sensitive and human epidermal growth factor receptor 2 negative
HIV	Human Immunodeficiency Virus
IMAP	Interprofessional Medication Adherence Program
IQR	Interquartile ranges
EM	Electronic monitor
MBC	Metastatic breast cancer
OAT	Oral anticancer therapies
OpTAT	Optimizing Targeted Anticancer Therapies study
PK-PD	Pharmacokinetics/pharmacodynamics
PI	Prediction Interval