inclusion criteria: 1. ≥ 18 years old; 2. diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); 3. being treated in the icu.

inclusion criteria: 1. ≥ 18 years old; 2. diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); 3. being treated in the icu.

inclusion criteria: ≥ 18 years old; diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); being treated in the icu.

inclusion criteria: ≥ 18 years old; diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); being treated in the icu.

inclusion criteria: 1. ≥ 18 years old; 2. diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); 3. being treated in the icu.

inclusion criteria: 1. ≥ 18 years old; 2. diagnosed as serious or critical sari (according to the 4th version of diagnosis and clinical management of 2019-ncov infected pneumonia); 3. being treated in the icu.