Note: *Based on 17,495 births representing the successful linkage of California birth records to VA enrollee records, the linkage yield is an estimated 95 percent, based on proxy of the successful linkage rate observed among the subpopulation of VA‐covered births (i.e., the subpopulation for which the true total of California Veteran births was known). [Color figure can be viewed at
http://www.wileyonlinelibrary.com/]