https://www.selleckchem.com/products/sis17.html efinition of allograft marginality in liver transplantation. The study's findings encourage the aggressive use of liver allografts and may indicate a need for a redefinition of allograft marginality in liver transplantation. The coronavirus disease 2019 (COVID-19) pandemic has drastically changed how comprehensive ophthalmology practices care for patients. To report practice patterns for common ocular complaints during the initial stage of the COVID-19 pandemic among comprehensive ophthalmology practices in the US. In this cross-sectional study, 40 private practices and 20 university centers were randomly selected from 4 regions across the US. Data were collected on April 29 and 30, 2020. Investigators placed telephone calls to each ophthalmology practice office. Responses to 3 clinical scenarios-refraction request, cataract evaluation, and symptoms of a posterior vitreous detachment-were compared regionally and between private and university centers. The primary measure was time to next appointment for each of the 3 scenarios. Secondary measures included use of telemedicine and advertisement of COVID-19 precautions. Of the 40 private practices, 2 (5%) were closed, 24 (60%) were only seeing urgent patients, and 14 (35ne ophthalmic complaints. Private practices had shorter times to next available appointment for cataract extraction and were more likely to evaluate posterior vitreous detachment symptoms. As there has not been a study examining these practice patterns before the COVID-19 pandemic, the relevance of these findings on public health is yet to be determined. In this cross-sectional study of investigator telephone calls to ophthalmology practice offices, there were uniform recommendations for the 3 routine ophthalmic complaints. Private practices had shorter times to next available appointment for cataract extraction and were more likely to evaluate posterior vitreous detachment symptoms. As there has not been