- Correspondence to Dr Alba Antequera Martín, Department of Epidemiology and Public Health, Biomedical Research Institute Sant Pau. Sant Antoni Maria Claret 167, building 18, 08025 Barcelona, Spain;
- Received November 22, 2019
- Revised February 21, 2020
- Accepted April 7, 2020
- First published May 6, 2020.
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