Diabetes, hypertension, body mass index, smoking and COVID-19-related mortality: a systematic review and meta-analysis of observational studies.
Yahya Mahamat-SalehThibault FioletMathieu Edouard RebeaudMatthieu MulotAnthony GuihurDouae El FatouhiNasser LaoualiNathan Peiffer-SmadjaDagfinn AuneGianluca SeveriPublished in: BMJ open (2021)
CRD42020218115.