Rates of MRSA colonization of sites in 62 MRSA-positive index persons. n, nose only; t, throat only; p, perineum only; o, other only; nt, nose + throat; np, nose + perineum; no, nose + other; tp, throat + perineum; po, perineum + other; ntp, nose + throat + perineum; nto, nose + throat + other; tpo, throat + perineum + other; npo, nose + perineum + other; ntpo, nose + throat + perineum + other.