Thank you for registering your child with the GP BOSSE 4 FOUNDATION and joining our growing SJIA Tiger community! Together, we are building a powerful movement of awareness, hope, and healing for children and families affected by Systemic Juvenile Idiopathic Arthritis (SJIA) and Macrophage Activation Syndrome (MAS).

By becoming part of this community, you’re not only showing strength and courage on your own family’s journey — you’re also helping us raise vital awareness, support groundbreaking research, and inspire compassion across the world. Every story shared, every event attended, and every act of kindness makes a meaningful difference in improving the lives of children living with SJIA and MAS.

We’re honored to have you with us as we continue to create a brighter, healthier future for all SJIA Tigers. Together, we stand stronger — united in hope, healing, and love.