I would like to express my sincere gratitude to Nina Borisovna Melik-Ogajanyan, endoscopist of the Diagnostic Endoscopy Department, and Tatyana Ivanovna Cherepukhina, nurse! Dear friends Nina Borisovna and Tatiana Ivanovna! Your patience, responsiveness, sensitivity, understanding, as a mother's care, friendly and attentive attitude, treat better than medical procedures. Such competent, skilled and talented, caring people work exactly where they are most needed. Thank you very much for your professionalism, love for your profession and high spiritual qualities: a kind heart, attentive attitude to patients.