Anderson C, Smitherman AB, Meernik C, Edwards TP, Deal AM, Cannizzaro N, Baggett CD, Chao C, Nichols HB. Patient/provider discussions about clinical trial participation and reasons for nonparticipation among adolescent and young adult women with cancer. J Adolesc Young Adul. 2020 Feb;9(1):41-6. doi: 10.1089/jayao.2019.0078
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.