Press photo, Allison Mackey (IMAGE) Karolinska Institutet Caption Allison Mackey, PhD student at Karolinska Institutet who recently completed her doctoral thesis about childhood hearing screening programs. Credit Ulf Sirborn Usage Restrictions This image should only be used when reporting about Allison Mackey's doctoral thesis. License Original 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.