Sponsor-Level Accountability on ClinicalTrials.gov: Modality-Stratified Backlog, Ghost Protocols, Overdue Debt, and Narrative-Field Gaps in 249,507 Older Closed Studies. Synthesis, [S. l.], v. 2, n. 7, 2026. Disponível em: https://synthesis-medicine.org/index.php/journal/article/view/177. Acesso em: 30 jul. 2026.