Organizations: X,Y,Z To use the sharing features on this page, please enable JavaScript. A collection of organizations providing health information arranged by topic. Also available in alphabetical order. X X-Rays American College of Radiology American Society of Neuroradiology American Society of Radiologic Technologists Food and Drug Administration Health Physics Society Radiological Society of North America Y Yeast Infections Centers for Disease Control and Prevention National Institute of Allergy and Infectious Diseases