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I had surgery 2.5 years ago. Many thanks to him and his team. My advice to those who are considering surgery.

He is very successful at his job. I can recommend him to his patients with a friendly and caring heart.

I have been researching sleeve gastrectomy surgeries for 8 months. Then I came across Cengiz Eriş on the internet and first we had a very nice chat with Mr. Ramazan. He answered all the questions in my mind in detail and put me at ease. That's why I decided to have surgery here. Because it gives so much confidence and support to people that I realized at that moment that I would do the surgery in the right place. Cengiz Eriş is truly a successful, soft-spoken and excellent person in his profession. Many thanks to him and his team.

I had the operation with him and am very satisfied.

He is a very caring, sincere and experienced doctor.

He is really one of the best quality doctors you can go to in Istanbul. You can go with your eyes closed. I recommend.

Don't waste your time with drugs, teas, cures that are temporary solutions, and don't believe everything you're told. My mistake was to believe everything that was told and to try everything that was told. I met my teachers at the point where I felt regret and despair. Hope for my despair, they cured my problem and saved me from diabetes for sure. Of course, you can continue your life in a healthier way by paying attention to the things you need to pay attention to. Thank you, I recommend.

He is the architect of my new life. After meeting with many doctors, he became the doctor I trusted the most. Thanks for everything.

I would like to thank Dr Gurdal Oren and his team for an amazing experience during my entire time at Derindere Hospital. I have been following him for over a year and he is one of the best in his field.
His work and hospital staffs professionalism has been remarkable. I feel very confident and happy. I look forward to seeing the results of my gastric sleeve surgery. I would recommend him to anyone considering weight lost and more healthy lifestyle.

After a long time, I decided to have the surgery and once again I believed that I made the right decision. From the beginning, due to the interest and reassuring attitude of Doctor Mehmet Bey; Uğur Bey and Nihan Hanım's thank you very much for your interest, smiling faces and help, which made us feel as if we had known each other for years. Glad to know you.