A Knock on the Door (IMAGE) Brown University Caption Kali Thomas, a former Meals on Wheels volunteer, has now led a randomized controlled trial showing that meal deliveries combat loneliness among seniors. Credit Michael Cohea/Brown University Usage Restrictions with credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.