Mellor R, Kearnes M, Lancaster K, McLauchlan L, Ritter A. Established tables and emergent huddles: exploring the processes of participation associated with the policy changes to opioid pharmacotherapy treatment in Australia in the context of COVID-19. Contemp Drug Probl. 2022 Sep 8;49(4):385-404. doi: 10.1177/00914509221123001
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.