PT - JOURNAL ARTICLE AU - Nigel Masters TI - A clinical indication on every repeat performance. DP - 2004 Jan 01 TA - British Journal of General Practice PG - 58--59 VI - 54 IP - 498 4099 - http://bjgp.org/content/54/498/58.2.short 4100 - http://bjgp.org/content/54/498/58.2.full SO - Br J Gen Pract2004 Jan 01; 54