CLINICAL AND PARACLINICAL CHARACTERISTICS OF PATIENTS UNDERGOING SURGICAL TREATMENT FOR PECTUS EXCAVATUM USING THORACOSCOPIC-ASSISTED NUSS PROCEDURE AT THE VIETNAM NATIONAL CHILDREN’S HOSPITAL. Vietnam Journal of Community Medicine, v. 67, n. CĐ7-Trường ĐH Y Dược Hải Phòng, 6 July2026.