Growing CAPITOL 4 Life: A Case Study of Co-designed Material for the First 1000 Days Using a Modified Double Diamond Approach - Andrew P. Hills; Sisitha Jayasinghe; Kylie Mulcahy; Kylie Burgess; Lisa Dalton; Kiran D. K. Ahuja; Roger Hughes; Nuala M. Byrne (Maternal and Child Health Journal, 2026)