Quansheng Song, Database Consultant Provides Technical Assistance for Guam EHDI by Guam CEDDERS Guam Early Hearing Detection & Intervention Quansheng Song, Database Consultant for the CDC Early Hearing Detection and Intervention (CDC EHDI) project was on Guam to provide technical assistance on April 18-20. Pictured left to right: Quansheng Song, Database Consultant; and JJ Mendiola, Interoperability Data Specialist, Guam ChildLink-EHDI. During the visit Mr. Song addressed issues related to interoperability, emergency back up and recovery plan.