Early Detection for Better Patient Outcome: A Case Report on Two Patients Presenting With Fibrodysplasia Ossificans Progressiva at Tikur Anbessa Specialized Hospital, Ethiopia

早期发现，改善患者预后：埃塞俄比亚蒂库尔·安贝萨专科医院两例进行性骨化性纤维发育不良患者的病例报告