?:authorAffiliation
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[\'Department of Veterans Affairs, Public Health Surveillance and Research, Palo Alto, CA, USA. Electronic address: Patricia.Schirmer@va.gov.\', \'Department of Veterans Affairs, Public Health Surveillance and Research, Palo Alto, CA, USA.\', \'Department of Veterans Affairs, Public Health Surveillance and Research, Palo Alto, CA, USA; Stanford University, Palo Alto, CA, USA.\']
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