A. A. Iakupova
Kazan Federal University
Russian Federation

Alina A. Iakupova — Resident Physician, Chair of Fundamentals of Clinical Medicine, Kazan Federal University.

420012, Kazan, Karla Marksa str., 76.

S. R. Abdulkhakov
Kazan Federal University; Kazan State Medical University
Russian Federation

Sayar R. Abdulkhakov — Cand. Sci. (Med.), Head of the Chair of Fundamentals of Clinical Medicine, Kazan Federal University, associate professor, Department (Chair) of Outpatient Therapy and General Medical Practice, Kazan State Medical University.

420012, Kazan, Karla Marksa str., 76.

R. K. Zalyalov
Kazan Federal University, University Clinic
Russian Federation

Ramil K. Zalyalov — Physician (endoscopy), Kazan Federal University.

420043, Kazan, Chekhova str., 1A.

A. G. Safin
Kazan Federal University, University Clinic
Russian Federation

Ayrat G. Safin — Physician (endoscopy), Head of the Department of Endoscopy, Kazan Federal University.

420043, Kazan, Chekhova str., 1A.

R. A. Abdulkhakov
Kazan State Medical University
Russian Federation

Rustam A. Abdulkhakov — Dr. Sci. (Med.), Prof., Chair of Hospital Therapy, Kazan State Medical University.

420012, Kazan, Butlerova str., 49.