In each nirmatrelvir–ritonavir group, the percentage of participants ... equation with compound symmetry variance–covariance structure was used to account for clustering.

Nirmatrelvir-ritonavir was beneficial for COVID-19 management in patients with chronic kidney disease or kidney failure, significantly reducing the risk of mortality and hospital admission.

In one dramatic example of the necessity of predicting crystal structures, scientists in the late 1990s discovered that capsules of the HIV drug ritonavir ... in crystal structure rendered the ...