The Pulmonary Division at UCSF has a long history of contribution to the care of patients with lung disease, of innovative research, and of training academic pulmonologists. The Division was developed in concert with the organization of the Cardiovascular Research Institute at UCSF by Julius Comroe in 1958. Dr Comroe, aside from developing and establishing much of modern pulmonary function testing, succeeded in attracting a cadre of strong scientists to UCSF, including John Severinghaus, John Clements, John Murray, and many others who subsequently contributed much to Pulmonary Medicine as it is known and practiced today. Clinical and research training have been an integral part of the Division and the CVRI since its earliest days. John Murray directed one of the earliest NIH training grants in pulmonary medicine beginning in 1966. Julius Comroe subsequently led this program into the 1970s while John Murray established a Pulmonary Section at the San Francisco General Hospital. Jay Nadel assumed the role as Director of the Research Training Grant in 1977 and continues now in this role. Since its inception the Research Training Program at UCSF has been continually funded by the National Institute of Health. Nearly a quarter of all academic pulmonologists in the United States have trained at UCSF.