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Prof. Dr. Ozan Beytemur is an experienced orthopedic surgeon with over 20 years in the field. He is a Professor at Health Sciences University, Istanbul Bağcılar Health Practice and Research Center. He is known for his research in bone healing, osteoporosis prediction, and orthopedic biomechanics. He has published many articles in leading international journals.

Dr. Beytemur has served as Chief Physician and has led improvements in orthopedic care and education. He holds the TOTBİD-TOTEK Board Certification. He has also completed international courses, including the AO Pediatric Trauma Course. He specializes in complex surgeries, such as bone tumor treatment and advanced fracture management. He is active in Turkish orthopedic associations and has supervised important theses, helping to advance orthopedic science and education.

Assoc. Prof. Dr. Burak Eren
Specialist in Brain and Nerve Surgery

Neurosurgery Areas of Interest
    •    Brain Tumors
    •    Pituitary Tumors (Endoscopic)
    •    Brain Aneurysms
    •    Skull Base Tumors
    •    Spinal and Spinal Cord Tumors
    •    Lumbar Disc Herniation
    •    Cervical Disc Herniation
    •    Spondylolisthesis
    •    Spinal Canal Stenosis
    •    Traumatic Brain and Spinal Injuries

Personal Information
    •    Date of Birth: 03/11/1979
    •    Marital Status: Married, Father of 2 children
    •    Languages: English
    •    Title: Associate Professor – 10/03/2021

Education
    •    Bachelor’s Degree: Eskişehir Osmangazi University Faculty of Medicine, 1997-2003
    •    Specialty Training: Bezmi Alem Valide Sultan Education and Research Hospital, Neurosurgery Clinic / Istanbul, 2004-2010

Professional Experience
    •    Köyceğiz SSK Dispensary / Muğla (2003-2004)
    •    Bezmi Alem Valide Sultan Education and Research Hospital / Istanbul (2004-2010)
    •    Bakırköy Dr. Sadi Konuk Education and Research Hospital / Istanbul (2010-2012)
    •    Bilecik State Hospital / Bilecik (2012-2013)
    •    Special Nisa Hospital / Istanbul (2013-2014)
    •    Bağcılar Education and Research Hospital / Istanbul (2014-2024)

Articles Published in International Peer-Reviewed Journals:
    1.    Sağlam-Çifci Ece, Güleç İlker, Şengelen Aslıhan, Karagöz-Güzey Feyza, EREN BURAK, Paşaoğlu H Esra, Önay-Uçar Evren. The H4R antagonist, JNJ-7777120 treatments ameliorate mild traumatic brain injury by reducing oxidative damage, inflammatory and apoptotic responses through blockage of the ERK1/2/NF-κB pathway in a rat model (2025). Experimental Neurology. 115133. DOI: 10.1016/j.expneurol.2024.115133.
    2.    EREN BURAK, Karagoz Guzey Feyza, Gulec Ilker, Tufan Azmi, Bas Nuri Serdar. The Importance of Spinopelvic Parameters in Recurrent Lumbar Disk Herniation. Clinical Spine Surgery, 37(3), E113-E118. (2024). DOI: 10.1097/BSD.0000000000001546.
    3.    Aycan Abdurrahman, EREN BURAK, Tas Abdurrahim. Treatment and outcomes of patients with metastatic spinal cord compression: a double-center study. European Review for Medical and Pharmacological Sciences, 27(13), 6121-6131. (2023). DOI: 10.26355/eurrev_202307_32968.
    4.    Yücel Murat, Aktaş Özgür Yusuf, Zengi Oğuzhan, Taş Abdurrahim, Tufan Azmi, EREN BURAK, Karagöz Güzey Feyza. The effect of alpha-lipoic acid on nerve tissue healing after sciatic nerve crush injury in rats. Annals of Medical Research, 30(6), 684-691. (2023). DOI: 10.5455/annalsmedres.2023.09.246.
    5.    Tufan Azmi, Aktaş Özgür, EREN BURAK, Doruk Ebru, Gulec Ilker, Taş Abdurrahim, Karagoz Guzey Feyza. Effects of Age and Co-Morbidities on Complication Rate in Surgical Treatment of Lumbar Degenerative Diseases: A Prospective Clinical Study. Eastern Journal of Medicine, 28(4). (2023). DOI: 10.5505/ejm.2023.89646.

Papers Presented at International Scientific Conferences:
    1.    EREN BURAK. Comparison of Patients Who Voluntarily Applied to the Neurosurgery Outpatient Clinic Due to Spinal Diseases and Patients Referred by Family Physicians. 19th International Eastern Mediterranean Family Medicine Congress, 1266-1267. (2020). (Abstract/Oral Presentation) (Publication No: 6514176).
    2.    EREN BURAK. Relationship Between Spinopelvic Parameters and Recurrent Lumbar Disc Herniation. World Spinal Column Society Virtual World Spine. (2020). (Abstract/Oral Presentation) (Publication No: 6514209).
    3.    Tas Abdurrahim, Karagoz Guzey Feyza, Tufan Azmi, Kuvat Nuray, Aktaş Özgür Yusuf, EREN BURAK, Yücel Murat, Kahraman Akkalp Asli. Prophylactic Effects of Silver Nanoparticles in a Rat Model of Spinal Stabilization and Infection. World Federation of Neurosurgical Societies XVI. World Congress, 33-34. (2017). (Abstract/Oral Presentation) (Publication No: 6513245).

Chapters in Scientific Books:
    1.    Klinik Nöroanatomi (Clinical Neuroanatomy), Chapter Title: (Lesions of the Hypophysis and Hypothalamus, Their Pathophysiology, and Surgical Anatomy) (2023). EREN BURAK, Tufan Azmi. Güneş Tıp Kitabevleri. Editors: Karagöz Güzey Feyza, Balcıoğlu Hüseyin Avni. 1st Edition. Page Count: 613. ISBN: 978-975-277-971-6. (Scientific Book in Turkish).
    2.    Nöroşirürjinin Temelleri (Fundamentals of Neurosurgery), Chapter Title: (Diagnosis, Classification, and Treatment of Thoracolumbar and Sacral Trauma) (2020). EREN BURAK, Karagöz Guzey Feyza. US Akademi. Editors: Naderi Sait, Karagöz Güzey Feyza, Tuğcu Bekir. 1st Edition. Page Count: 610. ISBN: 978-605-9358-. (Scientific Book in Turkish).

Articles Published in National Peer-Reviewed Journals:
    1.    EREN BURAK, Karagöz Güzey Feyza, Güleç İlker, Baş N. Serdar, Ay Ferhat, Acaroğlu Muhammed A., Çuhacıbaşı Enes B. Neurosurgery Career Preferences Compared to Other Medical Specialties among Turkish Students. Tıp Eğitimi Dünyası, 22(68), 143-153.
    2.    EREN BURAK, Gulec Ilker, Karagoz Guzey Feyza, Saglam Ece, Tufan Azmi, Karacan Murat, Bas Nuri Serdar. Evaluation of Multiple Myeloma Patients Undergoing Decompression Due to Spinal Cord Pressure. Osmangazi Journal of Medicine, 42(5), 546-552. (2020). DOI: 10.20515/otd.571004.

Technical Notes, Case Reports, Research Notes, etc.:
    1.    Case Report: EREN BURAK, Karagoz Guzey Feyza, Gulec Ilker. Craniopharyngioma and Arteriovenous Malformation Operated Using the Same Craniotomy: An Unusual Case. Romanian Neurosurgery, 34(3), 437-440. (2020). DOI: 10.33962/roneuro-2020-070.
    2.    Case Report: Tufan Azmi, EREN BURAK, Tas Abdurrahim, Berker Neslihan, Aktaş Özgür Yusuf, Gulec Ilker, Vatansever Mustafa Safi, Karacan Murat, Vahabova Günay, Karagoz Guzey Feyza. Spinal Metastasis as a Presenting Feature of Follicular Type Thyroid Carcinoma: A Case Report and Review of the Literature. Bagcilar Medical Bulletin, 4(1), 1-9. (2019). DOI: 10.4274/BMB.galenos.2019.26888.

Somjet Tosamran, MD, is a neurologist. Dr. Tosamran is a fellow in epilepsy at the Neurology Division, Department of Medicine, King Chulalongkorn Memorial Hospital, Bangkok, Thailand (2024–present). Dr. Tosamran completed a neurology residency at the same hospital (2021–2024). Earlier training includes internships at Charoenkrung Pracharak Hospital and Sakaeo Crown Prince Hospital.

Accreditations and education: Neurologist certification, King Chulalongkorn Memorial Hospital (2024). Master of Science in Internal Medicine, Faculty of Medicine, Chulalongkorn University (2024). Doctor of Medicine, First Class Honors, Faculty of Medicine, Chulalongkorn University (2018).

Oncologist

Professor Kyu Taek Lee is a top gastroenterologist from South Korea, specializing in the management of pancreatic, bile duct and gallbladder cancers. He is a Gastroenterology specialist at Samsung Medical Center and has degrees from Hanyang University College of Medicine, Stanford University School of Medicine, and Kyoto Second Red Cross Hospital. He is also a member of The Korean Society of Gastrointestinal Endoscopy and The Korean Society of Gastroenterology.

Prof. Jong Kyun Lee is a highly experienced gastroenterologist specializing in the management of pancreatic, bile duct and gallbladder cancers, pancreatitis, and gallstones. He has worked at Samsung Medical Center and holds degrees from the Seoul National University College of Medicine and the University of California. He is a member of several organizations, including The Korean Society of Gastrointestinal Endoscopy, The Korean Society of Gastroenterology, and The Korean Pancreatobiliary Association.

Head of the Breast Surgery Department, Mammologist

One of the world-renowned pioneers in gastrointestinal surgery. Has developed new techniques for the colon and rectum cancer treatment TaTMEТ and NOTES — applied now around the world.
Has performed over 15,000 surgeries.
Performs over 1,000 interventions a year using minimally invasive techniques.
President of the Association of Surgeons-Endoscopists in Europe.

Dr. Buse Cagla Ari, MD, is an Associate Professor of Neurology. She specializes in Parkinson’s disease and other movement disorders, headache disorders, sleep disorders, and dementia. She works at Istanbul Medipol University and the Parkinson’s Disease and Movement Disorders Center (PARMER). She previously served as an Assistant Professor at Bahcesehir University.

Her research focuses on Parkinson’s disease biomarkers, cognition, uric acid and cholesterol associations, restless legs syndrome, and complex headaches. This includes a 13-patient case series. She has published 15 international and 4 Turkish papers and 5 book chapters. Her work has 147 citations on Google Scholar (h-index 5) and 91 citations on Web of Science (h-index 5).

She is a member of the International Parkinson and Movement Disorders Society, the International Headache Society, and the Turkish Parkinson’s Disease Society. She serves as a peer reviewer for SAGE Open Medical Case Reports, BMC Neurology, and Parkinsonism & Related Disorders.

Dr. Inci Emekli is a neurologist at PARMER, Istanbul Medipol University (2025–). She specializes in Parkinson’s disease and movement disorders. She completed her neurology residency at Istanbul University (2015–2020). She then completed a neurology fellowship at Karabuk University (2020–2023) and movement disorders training at Michigan State University (2023–2024).

Her publications include an accepted article in Movement Disorders on the Head Snap Sign, a 2024 World Neurosurgery article on gender inequality in leadership, and a 2021 Parkinsonism & Related Disorders paper on hereditary Parkinson’s in Turkey. She delivered an oral presentation in 2022 on COVID‑19’s impact on carpal tunnel surgery. She also co‑authored a neurology chapter on hyperlipidemia in 2021.

Accreditation: Fellow of the Turkish Board of Neurology (2019–). Memberships: Turkish Society of Neurology (2016–) and European Academy of Neurology (2019–).

Oncogynecologist

Dr. Tara Rak-areekul is a neurologist focused on cognitive neurology. She is a fellow at King Chulalongkorn Memorial Hospital. She completed her neurology residency there and served as Chief of Academic in 2023. She holds an MD from Chulalongkorn University (Second Class Honors) and a Higher Graduate Diploma in Clinical Sciences. She is certified in NIHSS (2022) and the Thai Stroke Society Acute Stroke Treatment Course.

Key achievements include first rank in the National Formative Neurological Exam (2023). She won the Epilepsy Quiz Tournament (2023). She was first runner-up at the Neurology Tournaments at NST Midyear 2023 and the Chula Neuroscience Forum 2022. Her research includes AAIC poster presentations (2024, 2025). Ongoing work covers Alzheimer’s biomarkers (MDS‑OAβ and p‑tau217), the Thai clinical adaptation of HippoCamera, and a chapter on behavioral and psychological symptoms of dementia (BPSD).

Oncosurgeon, Head of Samsung Department of Urology

Dr. Kachain Namsirikul is a board-certified orthopaedic surgeon in Bangkok. He is accredited by the Royal College of Surgeons of Thailand (Orthopaedic Surgery). He completed specialist training in orthopaedic and spinal surgery at Queen’s Medical Centre, Nottingham, UK.

His practice focuses on knee and hip replacement, advanced osteoarthritis and other degenerative joint disease, trauma and fracture care, and spine and musculoskeletal surgery. He has held clinical roles at major hospitals in Bangkok.

He teaches and gives lectures on orthopaedics and sports medicine. Topics include female athletes and relative energy deficiency in sport (RED-S). Affiliation: Member, Royal College of Surgeons of Thailand (Orthopaedic Division).

Assoc. Prof. Ayşe İrem Yasin, M.D., is a medical oncologist who specializes in solid tumors. Her clinical focus includes breast, lung, gastrointestinal, gynecologic, and urologic cancers. She also treats brain and other CNS tumors, soft tissue sarcomas, head and neck cancers, adenocarcinomas, melanoma, Merkel cell carcinoma, and cancers of unknown primary. She practices at Medipol Acıbadem District Hospital (2025–present). She previously worked at Şişli Etfal Training and Research Hospital (2023–2025).

She completed a Medical Oncology fellowship at Bezmialem Vakıf University (2019–2022). This followed an Internal Medicine residency at the same institution (2012–2016). Her international experience includes the Breast Cancer Unit at the University of Piemonte Orientale in Novara (2022). She also trained at Basel University Hospital, Cleveland Clinic, and Harvard Medical School. She holds the ESMO Board Certificate (2022).

Dr. Fritz Leutmezer is a neurologist at Vienna General Hospital (AKH). He specializes in multiple sclerosis, epilepsy, movement disorders, tremors, memory problems, and stroke prevention. He uses advanced therapies and offers acupuncture for trigeminal neuralgia, headaches, and facial nerve palsy.

Dr. Leutmezer is President of the Austrian Multiple Sclerosis Society (ÖMSG) and Vice President of the Vienna Multiple Sclerosis Society (MSGW). He has written over 60 scientific articles and a book on multiple sclerosis. He donates all book proceeds to support MS patients in Vienna.

Gynecologist, Specialist in endoscopic and laparoscopic operations