Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
Abt Associates is a social science research firm that has been contracted by CDC to conduct the telephone survey and clinical evaluations. Since 1988, Abt Associates has assisted CDC with a series of CHRONIC FATIGUE SYNDROME studies. Abt Associates has telephone interviewers in Las Vegas, Nevada, and Hadley, Massachusetts, and field staff across the US.
