<affiliation wicri:level="2"><nlm:affiliation>Department of Medicine, Department of Veterans Affairs Palo Alto Healthcare System, Palo Alto, California7Department of Medicine, Stanford University Medical Center, Palo Alto, California.</nlm:affiliation>
<country>États-Unis</country>
<placeName><region type="state">Californie</region>
</placeName>
<wicri:cityArea>Department of Medicine, Department of Veterans Affairs Palo Alto Healthcare System, Palo Alto, California7Department of Medicine, Stanford University Medical Center, Palo Alto</wicri:cityArea>
</affiliation>