Luciano JV, Barrada JR, Aguado J, Osma J, García-Campayo J. Bifactor analysis and construct validity of the HADS: a cross-sectional and longitudinal study in fibromyalgia patients. Psychological Assessment. 2014 Jun;26(2):395-406.
Meyers JL, Davis KL, Yu YF. Stroke and transient ischemic attack in the long-term care setting: patient characteristics, medication treatment, and length of stay. Consult Pharm. 2011 Mar 1;26(3):170-81.