Roadblocks along the way.
Shulman
Stanford T
ST
D001432:Bacteriology / Q000266:history; D006293:Health Promotion; D049672:History, 19th Century; D049673:History, 20th Century; D007115:Immunization Schedule; D010372:Pediatrics / Q000266:history; D010678:Philately; D014611:Vaccination / Q000266:history*