Katerina Sergeevna Grechukhina is a wonderful competent, constantly improving her knowledge doctor! A real modern doctor, extremely attentive and friendly always, comments in detail on all appointments, tells what to do and in what situation when the side effects of chemotherapy develop. I underwent CT for breast cancer in April-September 2019, I am very happy with the attitude and competence of Katerina Sergeevna! The treatment went well! I recommend this doctor. Health to you, Katerina Sergeevna, success in your difficult task, and health to your patients!