A multicenter study of IgA nephropathy in children. A report of the Southwest Pediatric Nephrology Study Group11Southwest Pediatric Nephrology Study Group (SPNSG, Central Office, University of Texas Health Science Center at Dallas, Dallas, Texas): Director, Ronald J. Hogg; Pathology co-ordinators, Fred Silva, Pat Walker, Arthur G. Weinberg; Clinical co-ordinators, Shane Roy, Luther Travis, Jim Wenzl; Statistician, Joan Reisch; SPNSG Centers and individuals participating in this study: Baylor College of Medicine, Houston, Phillip Berry, Edith Hawkins, L. Leighton Hill, Sami Sanjad; Tulane University Medical Center, New Orleans, Frank Boineau, John Lewy, Pat Walker; University of Arkansas, Little Rock, Watson Arnold, A. R. Kalderon; University of Colorado, Denver, Stephen Guggenheim, Gary Lum; University of Oklahoma Medical Center, Oklahoma City, Henry Krous, James Matson, Jim Wenzl; University of Tennessee, Memphis, William Murphy, Shane Roy, Bruder Stapleton; University of Texas Health Science Center at Dallas, Billy S. Arant, Jr., Edwin H. Eigenbrodt, Mark Houser, Ruben Meyer, H. Leslie Moore, Joan Reisch, Fred Silva, Arthur G. Weinberg; University of Texas Health Science Center at Houston, Eileen Brewer, Susan B. Conley, Regina Verani; University of Texas Medical Branch, Galveston, Ben Brouhard, Tito Cavallo, Alok Kalia, Srinivasan Rajaraman, Luther Travis; preparation of this study and manuscript, Ronald J. Hogg, Fred Silva.