ZHANG, Jing; FAN, Haitao. Optimization of Health Service Utilization Among Elderly People with Chronic Diseases in Rural Ethnic Minorities in Northwest Yunnan Using Graph Neural Networks . Blockchain in Healthcare Today, [S. l.], v. 8, n. 3, 2025. DOI: 10.30953/bhty.v8.436. Disponível em: https://blockchainhealthcaretoday.com/index.php/journal/article/view/436. Acesso em: 25 apr. 2026.