1. Overview, Update, and Lessons Learned From the International EQ-5D-5L Valuation Work: Version 2 of the EQ-5D-5L Valuation Protocol
    Stolk E, Ludwig K, Rand K, Van Hout B, Ramos-Goni JM
    January 2019Volume 22, Issue 1, Pages 23–30
    Published : 02-01-2019  
  2. Quality Control Process for EQ-5D-5L Valuation Studies
    Ramos-Goñi JM, Oppe M, Slaap B, Busschbach JJ, Stolk EA
    Value in Health
    Published : 22-12-2016