Validation of the German eHealth impact questionnaire for online health information users affected by multiple sclerosis. - Anna Sippel; Karin Riemann-Lorenz; Jana Pöttgen; Renate Wiedemann; Karin Drixler; Eva Maria Bitzer; Christine Holmberg; Susanne Lezius; Christoph Heesen (BMC Medical Informatics Decis. Mak., 2022)