Article Information
vol. 17 no. 109 157-162
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History
- Published online November 28, 2008.
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© ERSJ Ltd
Author Information
- D. Sheppard
- D. Sheppard, University of California San Francisco, UCSF Box 2922, San Francisco, CA 94143-2922, USA. Fax: 1 4155144278. E-mail: dean.sheppard{at}ucsf.edu