Note: This list contains duplicate records, as identified by the OpenAIRE deduplication algorithm based on metadata analysis.

Vitamin D insufficiency in COVID-19 and influenza A, and critical illness survivors: a cross-sectional study BMJ Open · 2021 · 10.1136/bmjopen-2021-055435
Vitamin D insufficiency in COVID-19 and influenza A, and critical illness survivors: a cross-sectional study BMJ Open · 2021 · 10.17863/cam.76436
Vitamin D insufficiency in COVID-19 and influenza A, and critical illness survivors: a cross-sectional study BMJ Open · 2021 · 10.17863/cam.77349
Vitamin D insufficiency in COVID-19 and influenza A, and critical illness survivors: a cross-sectional study BMJ Open · 2021 · 10.60692/n0jkx-r5471
Vitamin D insufficiency in COVID-19 and influenza A, and critical illness survivors: a cross-sectional study BMJ Open · 2021 · 10.60692/n9w5x-75n61