![Prognostic factors associated with mortality risk and disease progression in 639 critically ill patients with COVID-19 in Europe: Initial report of the international RISC-19-ICU prospective observational cohort - eClinicalMedicine Prognostic factors associated with mortality risk and disease progression in 639 critically ill patients with COVID-19 in Europe: Initial report of the international RISC-19-ICU prospective observational cohort - eClinicalMedicine](https://www.thelancet.com/cms/asset/013097b1-3c7a-41f6-bccb-8e4f15447ef0/gr1.jpg)
Prognostic factors associated with mortality risk and disease progression in 639 critically ill patients with COVID-19 in Europe: Initial report of the international RISC-19-ICU prospective observational cohort - eClinicalMedicine
![Production of functional oocytes requires maternally expressed PIWI genes and piRNAs in golden hamsters | Nature Cell Biology Production of functional oocytes requires maternally expressed PIWI genes and piRNAs in golden hamsters | Nature Cell Biology](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41556-021-00745-3/MediaObjects/41556_2021_745_Fig1_HTML.png)
Production of functional oocytes requires maternally expressed PIWI genes and piRNAs in golden hamsters | Nature Cell Biology
![1622369480 (1622-3694-80 ) Blow-off Valve Replacement For Atlas Copco Air Compressor - Pneumatic Parts - AliExpress 1622369480 (1622-3694-80 ) Blow-off Valve Replacement For Atlas Copco Air Compressor - Pneumatic Parts - AliExpress](https://ae01.alicdn.com/kf/H1ad8e05610864a6a8c50cd1828b2e9f7u.jpg)