[1] STANFORD UNIV,MED CTR,SCH MED,CTR SLEEP DISORDERS,SLEEP DISORDERS CLIN,STANFORD,CA 94305
[2] SANTA CLARA VALLEY MED CTR,DEPT RESP MED,SANTA CLARA,CA
[3] UNIV CALIF SAN FRANCISCO,MED CTR,NEUROPATHOL UNIT,SAN FRANCISCO,CA 94143
[4] UNIV CALIF SAN FRANCISCO,MED CTR,DEPT RESP MED,SAN FRANCISCO,CA 94143