DE - Second search for the VA in web of science. Search conducted due to false positives retrieved from earlier search. RI - VASearch02.WOS.0001.5.17 - VASearch02.WOS.0095.5.17 QY - OG=(US Department of Veteran Affairs OR VA Greater Los Angeles Healthcare System OR VA Pittsburgh Healthcare System OR Veterans Affairs Medical Center - Birmingham OR Veterans Affairs Medical Center - Denver) NOT OG=(xVA Boston Healthcare System)