Rasch validation of the short form (8 item) PC-QoL questionnaire and applicability of use as a health state classification system for a new preference-based measure - Roberts, Jack M.; Chang, Anne B.; Goyal, Vikas; Kapur, Nitin; Marchant, Julie M.; McPhail, Steven M.; Kularatna, Sanjeewa (Quality of Life Research: An International Journal of Quality of Life Aspects of Treatment, Care and Rehabilitation - An Official Journal of the International Society of Quality of Life Research, 2024)