Annual prevalence of proteinuria, hematuria, and combined proteinuria/hematuria on first screening in junior high school children in Tokyo, Japan between 1974 and 2002. Annual prevalence of proteinuria, hematuria, and combined proteinuria/hematuria on first screening in junior high school children in Tokyo, Japan between 1974 and 2002. Reprinted by permission from Nature Publishing Group: Kidney International (Murakami et al. 67: 523 to 527. 2005) Ronald J. Hogg CJASN 2009;4:509-515 ©2009 by American Society of Nephrology