Myalgic Encephalomyelitis-Chronic Fatigue Syndrome Common Data Element item content analysis. oleh Mary D Slavin, Hannah M Bailey, Emily J Hickey, Ananya Vasudevan, Aileen Ledingham, Linda Tannenbaum, Lucinda Bateman, David L Kaufman, Daniel L Peterson, Ilene S Ruhoy, David M Systrom, Donna Felsenstein, Lewis E Kazis