title: Erratum to: Distilling the essence of appraisal: a mixed methods study of people with multiple sclerosis.
authors.affiliation: Department of Epidemiology and Population Health, Division of Community Collaboration and Implementation Science, Albert Einstein College of Medicine, Bronx, NY, USA.
authors.forename: Bruce D
authors.initials: BD
authors.lastname: Rapkin
authors.affiliation: DeltaQuest Foundation, Inc., 31 Mitchell Road, Concord, MA, 01742, USA. carolyn.schwartz@deltaquest.org.|Departments of Medicine and Orthopaedic Surgery, Tufts University Medical School, Boston, MA, USA. carolyn.schwartz@deltaquest.org.
authors.forename: Carolyn E
authors.initials: CE
authors.lastname: Schwartz