MRI-negative Cushing's Disease: Management Strategy and Outcomes in 15 Cases Utilizing a Pure Endoscopic Endonasal Approach. - Sharifi, Guive; Amin, Amir Arsalan; Sabahi, Mohammadmahdi; Echeverry, Nikolas B.; Dilmaghani, Nader Akbari; Mousavinejad, Seyed Ali; Valizadeh, Majid; Davoudi, Zahra; Adada, Badih; Borghei-Razavi, Hamid (BMC Endocrine Disorders, 2022)