Medical services in social security institutions.
D013505:Digestive System Surgical Procedures; D013502:General Surgery; D006801:Humans; D011183:Postoperative Complications; D011184:Postoperative Period; D012943:Social Security; D013270:Stomach / Q000601:surgery*
SOCIAL SECURITY; STOMACH/surgery; SURGERY/postoperative complications
Los servicios médicos en las instituciones de seguridad social.