Peginterferon beta-1a; 63 microgram/0.5 ml injection, 0.5 ml syringe + 94 microgram/0.5 ml injection, 0.5 ml syringe, 63 microgram/0.5 ml injection, 0.5 ml injection device + 94 microgram/0.5 ml injection, 0.5 ml injection device, 125 microgram/0.5 ml injection, 2 x 0.5 ml syringes, 125 microgram/0.5 ml injection, 2 x 0.5 ml injection devices; Plegridy®