Healthcare systems and health economics in GCC countries: informing decision-makers from the perspective of the Gulf health economics association - AlRuthia, Yazed; Aldallal, Sara; Al-Abdulkarim, Hana A.; Al-jedai, Ahmed; Almudaiheem, Hajer; Hamad, Anas; Elmusharaf, Khalifa; Saadi, Mouza; Al Awar, Hamda; Al Sabbah, Haleama; Alghnam, Suliman; Al Ghamdi, Mohamed; et al. (Frontiers in Public Health, 2025)