Clark M, Berry P, Martin S, Harris N, Sprecher D, Olitsky S, Hoag JB. Nosebleeds in hereditary hemorrhagic telangiectasia: development of a patient-completed daily eDiary. Laryngoscope Investig Otolaryngol. 2018 Nov 14;3(6):439-45. doi: 10.1002/lio2.211
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.