Descripción
Notas:Bibliographic Level Mode of Issuance: Monograph
Descripción Física:1 online resource
Formato:Mode of access: Internet from the AHRQ web site. Address as of 10/12/05: http://www.ahrq.gov/clinic/epcsums/spirosum.pdf; current access available via PURL.
Bibliografía:Includes bibliographical references.