PT - JOURNAL ARTICLE AU - Williams, Peter R. TI - Opportunistic surveillance of children DP - 1985 May 01 TA - The Journal of the Royal College of General Practitioners PG - 248--250 VI - 35 IP - 274 4099 - http://bjgp.org/content/35/274/248.2.short 4100 - http://bjgp.org/content/35/274/248.2.full SO - J R Coll Gen Pract1985 May 01; 35