PT - JOURNAL ARTICLE AU - N Campbell AU - B H Smith TI - Equal and opposite reaction to Willis. DP - 2001 Dec 01 TA - British Journal of General Practice PG - 1016--1016 VI - 51 IP - 473 4099 - http://bjgp.org/content/51/473/1016.1.short 4100 - http://bjgp.org/content/51/473/1016.1.full SO - Br J Gen Pract2001 Dec 01; 51