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Direk MÇ, Besen Ş, Öncel İ, Günbey C, Özdoğan O, Orgun LT, Sahin S, Cansu A, Yıldız N, Kanmaz S, Yılmaz S, Tekgül H, Türkdoğan D, Ünver O, Thomas GÖ, Başıbüyük S, Yılmaz D, Kurt AN, Gültutan P, Özsoy Ö, Yiş U, Kurul SH, Güngör S, Özgör B, Karadağ M, Dündar NO, Gençpınar P, Bildik O, Orak SA, Kabur ÇÇ, Kara B, Karaca Ö, Canpolat M, Gümüş H, Per H, Yılmaz Ü, Karaoğlu P, Ersoy Ö, Tosun A, Öztürk SB, Yüksel D, Atasoy E, Gücüyener K, Yıldırım M, Bektaş Ö, Çavuşoğlu D, Yarar Ç, Güngör O, Mert GG, Sarıgeçili E, Edizer S, Çetin İD, Aydın S, Diler B, Özdemir AA, Erol İ, Okuyaz Ç, Anlar B. Optic neuritis in Turkish children and adolescents: A multicenter retrospective study. Mult Scler Relat Disord 2024; 81:105149. [PMID: 38096730 DOI: 10.1016/j.msard.2023.105149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/15/2023] [Accepted: 11/20/2023] [Indexed: 01/23/2024]
Abstract
BACKGROUND Various etiologies may underlie optic neuritis, including autoantibody-mediated disorders described in the last decade. We re-examined demographic, clinical, laboratory features and prognostic factors in pediatric patients with autoimmune optic neuritis according to current knowledge. METHODS Cases of pediatric ON from 27 centers in Türkiye diagnosed between 2009 and 2022 were included for retrospective evaluation. RESULTS The study included 279 patients, 174 females and 105 males, with a female-to-male ratio of 1.65. The average age at onset was 12.8 ± 3.4 years, and mean follow-up, 2.1 years (range: 1-12.1 years). Patients <10 years old were grouped as "prepubertal" and those ≥10 years old as "others". The diagnoses made at the end of follow-up were multiple sclerosis associated optic neuritis (n = 90, 32.3 %), single isolated optic neuritis (n = 86, 31 %), clinically isolated syndrome (n = 41, 14.7 %), myelin oligodendrocyte glycoprotein antibody associated optic neuritis (n = 22, 7.9 %), and relapsing isolated optic neuritis (n = 18, 6.5 %). Predominant diagnoses were myelin oligodendrocyte glycoprotein antibody associated optic neuritis and acute disseminated encephalomyelitis associated optic neuritis in the prepubertal group and multiple sclerosis associated optic neuritis in the older group. Recurrences were observed in 67 (24 %) patients, including 28 with multiple sclerosis associated optic neuritis, 18 with relapsing isolated optic neuritis, 11 with myelin oligodendrocyte glycoprotein antibody associated optic neuritis, 8 with aquaporin-4 antibody related optic neuritis, and 2 with chronic relapsing inflammatory optic neuropathy. Recurrences were more common among female patients. Findings supporting the diagnosis of multiple sclerosis included age of onset ≥ 10 years (OR=1.24, p = 0.027), the presence of cranial MRI lesions (OR=26.92, p<0.001), and oligoclonal bands (OR=9.7, p = 0.001). Treatment in the acute phase consisted of intravenous pulse methylprednisolone (n = 46, 16.5 %), pulse methylprednisolone with an oral taper (n = 212, 76 %), and combinations of pulse methylprednisolone, plasmapheresis, or intravenous immunoglobulin (n = 21, 7.5 %). Outcome at 12 months was satisfactory, with 247 out of 279 patients (88.5 %) demonstrating complete recovery. Thirty-two patients exhibited incomplete recovery and further combination treatments were applied. Specifically, patients with relapsing isolated optic neuritis and aquaporin-4 antibody related optic neuritis displayed a less favorable prognosis. CONCLUSION Our results suggest optic neuritis is frequently bilateral in prepubertal and unilateral in peri‑ or postpubertal patients. Age of onset 10 or older, presence of oligoclonal bands, and brain MRI findings reliably predict the development of multiple sclerosis. The risk of developing multiple sclerosis increases mostly during the second and third years of follow-up. Relapsing isolated optic neuritis remains a separate group where the pathogenesis and outcome remain unclear. Investigation of predisposing and diagnostic biomarkers and long follow-up could help to define this group.
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Affiliation(s)
- Meltem Çobanoğulları Direk
- Department of Pediatrics, Division of Pediatric Neurology, Mersin University Faculty of Medicine, Faculty Of Medicine, 34, Cadde, Çiftlikköy Kampüsü, Mersin 33343, Türkiye.
| | - Şeyda Besen
- Department of Pediatrics, Division of Pediatric Neurology, Başkent University Faculty of Medicine, Adana, Türkiye
| | - İbrahim Öncel
- Department of Pediatrics, Division of Pediatric Neurology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
| | - Ceren Günbey
- Department of Pediatrics, Division of Pediatric Neurology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
| | - Orhan Özdoğan
- Department of Pediatrics, Division of Pediatric Neurology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
| | - Leman Tekin Orgun
- Department of Pediatrics, Division of Pediatric Neurology, Başkent University Faculty of Medicine, Adana, Türkiye
| | - Sevim Sahin
- Department of Pediatrics, Division of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Türkiye
| | - Ali Cansu
- Department of Pediatrics, Division of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Türkiye
| | - Nihal Yıldız
- Department of Pediatrics, Division of Pediatric Neurology, Karadeniz Technical University Faculty of Medicine, Trabzon, Türkiye
| | - Seda Kanmaz
- Department of Pediatrics, Division of Pediatric Neurology, Ege University Faculty of Medicine, İzmir, Türkiye
| | - Sanem Yılmaz
- Department of Pediatrics, Division of Pediatric Neurology, Ege University Faculty of Medicine, İzmir, Türkiye
| | - Hasan Tekgül
- Department of Pediatrics, Division of Pediatric Neurology, Ege University Faculty of Medicine, İzmir, Türkiye
| | - Dilşad Türkdoğan
- Department of Pediatrics, Division of Pediatric Neurology, Marmara University Pendik Training and Research Hospital, İstanbul, Türkiye
| | - Olcay Ünver
- Department of Pediatrics, Division of Pediatric Neurology, Marmara University Pendik Training and Research Hospital, İstanbul, Türkiye
| | - Gülten Öztürk Thomas
- Department of Pediatrics, Division of Pediatric Neurology, Marmara University Pendik Training and Research Hospital, İstanbul, Türkiye
| | - Salih Başıbüyük
- Department of Pediatrics, Division of Pediatric Neurology, Marmara University Pendik Training and Research Hospital, İstanbul, Türkiye
| | - Deniz Yılmaz
- Department of Pediatrics, Division of Pediatric Neurology, Ankara City Hospital, Ankara, Türkiye
| | - Ayşegül Neşe Kurt
- Department of Pediatrics, Division of Pediatric Neurology, Ankara City Hospital, Ankara, Türkiye
| | - Pembe Gültutan
- Department of Pediatrics, Division of Pediatric Neurology, Ankara City Hospital, Ankara, Türkiye
| | - Özlem Özsoy
- Department of Pediatrics, Division of Pediatric Neurology, Dokuz Eylül University Faculty of Medicine, İzmir, Türkiye
| | - Uluç Yiş
- Department of Pediatrics, Division of Pediatric Neurology, Dokuz Eylül University Faculty of Medicine, İzmir, Türkiye
| | - Semra Hız Kurul
- Department of Pediatrics, Division of Pediatric Neurology, Dokuz Eylül University Faculty of Medicine, İzmir, Türkiye
| | - Serdal Güngör
- Department of Pediatrics, Division of Pediatric Neurology, İnönü University Faculty of Medicine, Malatya, Türkiye
| | - Bilge Özgör
- Department of Pediatrics, Division of Pediatric Neurology, İnönü University Faculty of Medicine, Malatya, Türkiye
| | - Meral Karadağ
- Department of Pediatrics, Division of Pediatric Neurology, İnönü University Faculty of Medicine, Malatya, Türkiye
| | - Nihal Olgaç Dündar
- Department of Pediatrics, Division of Pediatric Neurology, Katip Celebi University Faculty of Medicine, İzmir, Türkiye
| | - Pınar Gençpınar
- Department of Pediatrics, Division of Pediatric Neurology, Katip Celebi University Faculty of Medicine, İzmir, Türkiye
| | - Olgay Bildik
- Department of Pediatrics, Division of Pediatric Neurology, Katip Celebi University Faculty of Medicine, İzmir, Türkiye
| | - Sibğatullah Ali Orak
- Department of Pediatrics, Division of Pediatric Neurology, Celal Bayar University Faculty of Medicine, Manisa, Türkiye
| | - Çişil Çerçi Kabur
- Department of Pediatrics, Division of Pediatric Neurology, Celal Bayar University Faculty of Medicine, Manisa, Türkiye
| | - Bülent Kara
- Department of Pediatrics, Division of Pediatric Neurology, Kocaeli University Faculty of Medicine, Kocaeli, Türkiye
| | - Ömer Karaca
- Department of Pediatrics, Division of Pediatric Neurology, Kocaeli University Faculty of Medicine, Kocaeli, Türkiye
| | - Mehmet Canpolat
- Department of Pediatrics, Division of Pediatric Neurology, Erciyes University Faculty of Medicine, Kayseri, Türkiye
| | - Hakan Gümüş
- Department of Pediatrics, Division of Pediatric Neurology, Erciyes University Faculty of Medicine, Kayseri, Türkiye
| | - Hüseyin Per
- Department of Pediatrics, Division of Pediatric Neurology, Erciyes University Faculty of Medicine, Kayseri, Türkiye
| | - Ünsal Yılmaz
- İzmir Faculty of Medicine, Dr. Behçet Uz Children's Education and Research Hospital, Department of Pediatrics, Division of Pediatric Neurology, University of Health Sciences Türkiye, İzmir, Türkiye
| | - Pakize Karaoğlu
- İzmir Faculty of Medicine, Dr. Behçet Uz Children's Education and Research Hospital, Department of Pediatrics, Division of Pediatric Neurology, University of Health Sciences Türkiye, İzmir, Türkiye
| | - Özlem Ersoy
- Department of Pediatrics, Division of Pediatric Neurology, Mersin University Faculty of Medicine, Faculty Of Medicine, 34, Cadde, Çiftlikköy Kampüsü, Mersin 33343, Türkiye
| | - Ayşe Tosun
- Department of Pediatrics, Division of Pediatric Neurology, Adnan Menderes University Faculty of Medicine, Aydın, Türkiye
| | - Semra Büyükkorkmaz Öztürk
- Department of Pediatrics, Division of Pediatric Neurology, Adnan Menderes University Faculty of Medicine, Aydın, Türkiye
| | - Deniz Yüksel
- Dr Sami Ulus Maternity and Children's Education and Research Hospital, University of Health Sciences, Ankara, Türkiye
| | - Ergin Atasoy
- Dr Sami Ulus Maternity and Children's Education and Research Hospital, University of Health Sciences, Ankara, Türkiye
| | - Kıvılcım Gücüyener
- Department of Pediatrics, Division of Pediatric Neurology, Gazi University Faculty of Medicine, Ankara, Türkiye
| | - Miraç Yıldırım
- Department of Pediatrics, Division of Pediatric Neurology, Ankara University Faculty of Medicine, Ankara, Türkiye
| | - Ömer Bektaş
- Department of Pediatrics, Division of Pediatric Neurology, Ankara University Faculty of Medicine, Ankara, Türkiye
| | - Dilek Çavuşoğlu
- Department of Pediatrics, Division of Pediatric Neurology, Afyonkarahisar Health Sciences University, Afyon, Türkiye
| | - Çoşkun Yarar
- Department of Pediatrics, Division of Pediatric Neurology, Osmangazi University Faculty of Medicine, Eskişehir, Türkiye
| | - Olcay Güngör
- Department of Pediatrics, Division of Pediatric Neurology, Pamukkale University Faculty of Medicine, Denizli, Türkiye
| | - Gülen Gül Mert
- Department of Pediatrics, Division of Pediatric Neurology, Cukurova University Faculty of Medicine, Adana, Türkiye
| | - Esra Sarıgeçili
- Department of Pediatrics, Division of Pediatric Neurology, Adana City Training and Research Hospital, Adana, Türkiye
| | - Selvinaz Edizer
- Department of Pediatrics, Division of Pediatric Neurology, Istanbul Bezm-i Alem Vakıf University Hospital, İstanbul, Türkiye
| | - İpek Dokurel Çetin
- Department of Pediatrics, Division of Pediatric Neurology, Balıkesir Ataturk City Hospital, Balıkesir, Türkiye
| | - Seren Aydın
- Department of Pediatrics, Division of Pediatric Neurology, Samsun Ondokuz Mayıs University Faculty of Medicine, Samsun, Türkiye
| | - Betül Diler
- Giresun Maternity and Children's Education and Research Hospital, Pediatric Neurology, Giresun, Türkiye
| | - Asena Ayça Özdemir
- Department of Medical Education, Mersin University Faculty of Medicine, Mersin, Türkiye
| | - İlknur Erol
- Department of Pediatrics, Division of Pediatric Neurology, Başkent University Faculty of Medicine, Adana, Türkiye
| | - Çetin Okuyaz
- Department of Pediatrics, Division of Pediatric Neurology, Mersin University Faculty of Medicine, Faculty Of Medicine, 34, Cadde, Çiftlikköy Kampüsü, Mersin 33343, Türkiye
| | - Banu Anlar
- Department of Pediatrics, Division of Pediatric Neurology, Hacettepe University Faculty of Medicine, Ankara, Türkiye
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Vujosevic S, Parra MM, Hartnett ME, O'Toole L, Nuzzi A, Limoli C, Villani E, Nucci P. Optical coherence tomography as retinal imaging biomarker of neuroinflammation/neurodegeneration in systemic disorders in adults and children. Eye (Lond) 2023; 37:203-219. [PMID: 35428871 PMCID: PMC9012155 DOI: 10.1038/s41433-022-02056-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 03/10/2022] [Accepted: 03/31/2022] [Indexed: 01/28/2023] Open
Abstract
The retina and the optic nerve are considered extensions of the central nervous system (CNS) and thus can serve as the window for evaluation of CNS disorders. Spectral domain optical coherence tomography (OCT) allows for detailed evaluation of the retina and the optic nerve. OCT can non-invasively document changes in single retina layer thickness and structure due to neuronal and retinal glial cells (RGC) modifications in systemic and local inflammatory and neurodegenerative diseases. These can include evaluation of retinal nerve fibre layer and ganglion cell complex, hyper-reflective retinal spots (HRS, sign of activated microglial cells in the retina), subfoveal neuroretinal detachment, disorganization of the inner retinal layers (DRIL), thickness and integrity of the outer retinal layers and choroidal thickness. This review paper will report the most recent data on the use of OCT as a non invasive imaging biomarker for evaluation of the most common systemic neuroinflammatory and neurodegenerative/neurocognitive disorders in the adults and in paediatric population. In the adult population the main focus will be on diabetes mellitus, multiple sclerosis, optic neuromyelitis, neuromyelitis optica spectrum disorders, longitudinal extensive transverse myelitis, Alzheimer and Parkinson diseases, Amyotrophic lateral sclerosis, Huntington's disease and schizophrenia. In the paediatric population, demyelinating diseases, lysosomal storage diseases, Nieman Pick type C disease, hypoxic ischaemic encephalopathy, human immunodeficiency virus, leukodystrophies spinocerebellar ataxia will be addressed.
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Affiliation(s)
- Stela Vujosevic
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy.
- Eye Clinic, IRCCS MultiMedica, Milan, Italy.
| | - M Margarita Parra
- Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, UT, USA
| | - M Elizabeth Hartnett
- Department of Ophthalmology and Visual Sciences, John A. Moran Eye Center, University of Utah, Salt Lake City, UT, USA
| | - Louise O'Toole
- Department of Ophthalmology Mater Private Network, Dublin, Ireland
| | - Alessia Nuzzi
- Eye Clinic, IRCCS MultiMedica, Milan, Italy
- University of Milan, Milan, Italy
| | - Celeste Limoli
- Eye Clinic, IRCCS MultiMedica, Milan, Italy
- University of Milan, Milan, Italy
| | - Edoardo Villani
- Eye Clinic, IRCCS MultiMedica, Milan, Italy
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Paolo Nucci
- Department of Biomedical, Surgical and Dental Sciences, University of Milan, Milan, Italy
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Posporis C, Beltran E, Dunning M, Espadas I, Gillespie S, Barry AT, Wessmann A. Prognostic Factors for Recovery of Vision in Canine Optic Neuritis of Unknown Etiology: 26 Dogs (2003-2018). Front Vet Sci 2019; 6:415. [PMID: 31824972 PMCID: PMC6882734 DOI: 10.3389/fvets.2019.00415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Accepted: 11/07/2019] [Indexed: 12/03/2022] Open
Abstract
Optic neuritis (ON) is a recognized condition, yet factors influencing recovery of vision are currently unknown. The purpose of this study was to identify prognostic factors for recovery of vision in canine ON of unknown etiology. Clinical databases of three referral hospitals were searched for dogs with presumptive ON based on clinicopathologic, MRI/CT, and fundoscopic findings. Twenty-six dogs diagnosed with presumptive ON of unknown etiology, isolated (I-ON) and MUE-associated (MUE-ON), were included in the study. Their medical records were reviewed retrospectively, and the association of complete recovery of vision with signalment, clinicopathologic findings, and treatment was investigated. Datasets were tested for normality using the D'Agostino and Shapiro-Wilk tests. Individual datasets were compared using the Chi-squared test, Fisher's exact test, and the Mann-Whitney U-test. For multiple comparisons with parametric datasets, the one-way analysis of variance (ANOVA) was performed, and for non-parametric datasets, the Kruskal-Wallis test was performed to test for independence. For all data, averages are expressed as median with interquartile range and significance set at p < 0.05. Twenty-six dogs met the inclusion criteria. Median follow-up was 230 days (range 21–1901 days, mean 496 days). Six dogs (23%) achieved complete recovery and 20 dogs (77%) incomplete or no recovery of vision. The presence of a reactive pupillary light reflex (p = 0.013), the absence of fundoscopic lesions (p = 0.0006), a younger age (p = 0.038), and a lower cerebrospinal fluid (CSF) total nucleated cell count (TNCC) (p = 0.022) were statistically associated with complete recovery of vision. Dogs with I-ON were significantly younger (p = 0.046) and had lower CSF TNCC (p = 0.030) compared to the MUE-ON group. This study identified prognostic factors that may influence complete recovery of vision in dogs with ON. A larger cohort of dogs is required to determine whether these findings are robust and whether additional parameters aid accurate prognosis for recovery of vision in canine ON.
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Affiliation(s)
| | - Elsa Beltran
- Queen Mother Hospital for Animals, Royal Veterinary College, Hatfield, United Kingdom
| | - Mark Dunning
- School of Veterinary Medicine and Science, University of Nottingham, Loughborough, United Kingdom.,Willows Veterinary Centre and Referral Service, Shirley, United Kingdom
| | - Irene Espadas
- Neurology/Neurosurgery Service, Pride Veterinary Centre, Derby, United Kingdom.,Small Animal Teaching Hospital, School of Veterinary Sciences, University of Liverpool, Neston, United Kingdom
| | - Sabrina Gillespie
- Queen Mother Hospital for Animals, Royal Veterinary College, Hatfield, United Kingdom
| | - Amy Teresa Barry
- Queen Mother Hospital for Animals, Royal Veterinary College, Hatfield, United Kingdom
| | - Annette Wessmann
- Neurology/Neurosurgery Service, Pride Veterinary Centre, Derby, United Kingdom
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Song H, Zhou H, Yang M, Tan S, Wang J, Xu Q, Liu H, Wei S. Clinical characteristics and prognosis of myelin oligodendrocyte glycoprotein antibody-seropositive paediatric optic neuritis in China. Br J Ophthalmol 2018; 103:831-836. [PMID: 30049802 DOI: 10.1136/bjophthalmol-2018-312399] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/21/2018] [Accepted: 07/05/2018] [Indexed: 01/28/2023]
Abstract
BACKGROUND/AIMS To investigate clinical characteristics and prognosis of paediatric optic neuritis (PON) in patients seropositive for myelin oligodendrocyte glycoprotein antibody (MOG-Ab) in China. METHODS Children displaying initial onset of optic neuritis (ON) were recruited from the Neuro-ophthalmology Department in the Chinese People's Liberation Army General Hospital from January 2016 to August 2017. They were assigned into three groups based on antibody status: MOG-Ab-seropositive ON (MOG-ON), aquaporin-4 antibody-seropositive ON (AQP4-ON) and double seronegative ON (seronegative-ON). RESULTS Totally 48 patients were assessed, including 25 MOG-ON (52.1%), 7 AQP4-ON (14.6%) and 16 seronegative-ON (33.3%). The MOG-ON and seronegative-ON cohorts had equal ratios of female/male, but the AQP4-ON cohort was predominantly females (100%). The patients with MOG-ON were significantly younger at onset compared with the AQP4-ON group. Of the MOG-ON eyes, 97.6% had good recovery of visual acuity (VA) (≥0.5) compared with33.3% of AQP4-ON eyes (p<0.001). However, there was no significant difference compared with the seronegative-ON eyes (82.6%, p=0.052). Two children in the MOG-ON group ended up being diagnosed with acute disseminated encephalomyelitis, while only one patient in the AQP4-ON group developed neuromyelitis optica during follow-up. Patients with MOG-ON had thicker peripapillary retinal nerve fibre layers overall and in the superior and inferior quadrants than in patients with AQP4-ON (p=0.005, p=0.002 and p=0.024, respectively). In addition, the macular ganglion cell-inner plexiform in MOG-ON eyes became significantly thicker than in AQP4-ON eyes (p=0.029). Orbital MRI revealed a larger proportion of patients with MOG-ON had intracranial optic nerve involvement than patients with seronegative-ON (51.2% vs 17.4%, p=0.009). CONCLUSION MOG-ON was the most common PON subtype in China. MOG-ON had different clinical features including earlier age of onset, equal female/male ratio, better recovery of VA and thicker peripapillary retinal nerve fibre and macular ganglion cell-inner plexiform layers. MOG-Abs may be a potential biomarker for determining visual prognosis with PON.
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Affiliation(s)
- Honglu Song
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Huanfen Zhou
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Mo Yang
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Shaoying Tan
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China.,Joint Shantou International Eye Center, Shantou University and Chinese University of Hong Kong, Shantou, China
| | - Junqing Wang
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Quangang Xu
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Hongjuan Liu
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Shihui Wei
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
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