American College of Chest Physicians
The American College of Chest Physicians (ACCP) is a medical specialty society of professionals who specialize in diseases of the chest.

American Academy of Pediatrics
The professional society for pediatricians. AAP publishes the medical journal Pediatrics

American Association for the Study of Liver Disease
AASLD provides a "find a hepatologist" search feature on their website, as well as publications on liver disease and transplantation.

American Thoracic Society
A scientific society which focuses on respiratory and critical care medicine.