Hospital episodes and physician visits: the concordance between self-reports and medicare claims.
Wolinsky FD, Miller TR, An H, Geweke JF, Wallace RB, Wright KB, Chrischilles EA, Liu L, Pavlik CB, Cook EA, Ohsfeldt RL, Richardson KK, Rosenthal GE. Hospital episodes and physician visits: the concordance between self-reports and medicare claims. Med Care. 2007 Apr; 45(4):300-7.