PT - JOURNAL ARTICLE AU - D Hall TI - Differential diagnosis of otitis media and externa. DP - 1992 Nov 01 TA - British Journal of General Practice PG - 494--494 VI - 42 IP - 364 4099 - http://bjgp.org/content/42/364/494.1.short 4100 - http://bjgp.org/content/42/364/494.1.full SO - Br J Gen Pract1992 Nov 01; 42