Rockwood NJ, Jeon M. Estimating complex measurement and growth models using the R package PLmixed. Multivar Behav Res. 2019 Mar;54(2):288-306. doi: 10.1080/00273171.2018.1516541
DiBenedetti D, Baranowski E, Zelt S, Reynolds M, Sherrill B. Assessing United States patient and dermatologist experiences with severe chronic hand eczema. J Clin Aesthet Dermatol. 2015 Nov;8(11):19-27.