Validity assessment of the PROMIS fatigue domain among people living with HIV oleh L. E. Gibbons, R. Fredericksen, D. S. Batey, L. Dant, T. C. Edwards, K. H. Mayer, W. C. Mathews, L. S. Morales, M. J. Mugavero, F. M. Yang, E. Paez, M. M. Kitahata, D. L. Patrick, H. M. Crane, P. K. Crane, for the Centers for AIDS Research Network of Integrated Clinical Systems (CNICS)