The purpose of this study is to measure the long-term safety and tolerability of efgartigimod PH20 SC in adult participants with IIM who previously participated in ARGX-113-2007. Secondary objectives include efficacy measures of efgartigimod PH20 SC鈥�
- Investigator
- Michael R Bubb
- Ages
- 18 Years - N/A
- Sexes
- All