Bibliographical noteFunding Information:
From the Department of Pediatrics, University of Minnesota Health Sciences Center, and the Department of Medicine, Veterans Administration Medical Center. Supported in part by the National Institutes" of Health Training Grant No. NIH 5T32-A M 07117, National Research Fellowship Grant No. 1F32-HD-05716, General Clinical Research Center No. RRO0400, Minnesota State Health Research Program Grant and the Veterans Administrations. *Reprint address: Box 279--Mayo Memorial, Un(versity of Minnesota Health Sciences Center, Minneapolis, MN 55455.