ANMCS	National Authority of Quality Management in Health
ANOVA	Analysis of variance is a collection of statistical models and their associated estimation procedures used to analyze the differences among means
COVID-19	Coronavirus disease 2019
DEA-BCC model	Data Envelopment Analysis-Banker, Charnes and Cooper Model
EU	European Union
EUROSTAT	is the statistical office of the European Union
GDP	Gross Domestic Product
IBM SPSS	software platform offers advanced statistical analysis, a vast library of machine learning algorithms, text analysis, open source extensibility, integration with big data and seamless deployment into applications
ISQua	International Society for Quality in Health Care
PPP	Purchasing power parity
OECD	Organisation for Economic Co-operation and Development
SARS-CoV-2	Severe acute respiratory syndrome coronavirus 2
VOSviewer	software tool for constructing and visualizing bibliometric networks