Fig. 1From: Reasons for discontinuation of subcutaneous interferon β-1a three times a week among patients with multiple sclerosis: a real-world cohort studyPatient flow selection. ICD-9, International Classification of Diseases, Revision 9. MS, multiple sclerosis. sc IFN β-1a tiw, subcutaneous interferon beta-1a three times a week. Numbers in brackets are the proportion of original patientsBack to article page