Chen, Wei-Ti, Cheng-Shi Shiu, Joyce P. Yang, Shih-Yu Lee, Tony Szu-Hsien Lee, Jane M. Simoni, Mei-Juan Bao, and Hong-Zhou Lu. "Fatigue and Sleep Disturbance Related to Perceived Stress in Chinese HIV-Positive Individuals: A Mixed Methods Study." Journal of AIDS & clinical research 4, no. 6 (2013).