PT - JOURNAL ARTICLE ED - , TI - Methods of Psychiatric Research DP - 1963 May 01 TA - The Journal of the College of General Practitioners PG - 309--310 VI - 6 IP - 2 4099 - http://bjgp.org/content/6/2/309.2.short 4100 - http://bjgp.org/content/6/2/309.2.full SO - J Coll Gen Pract1963 May 01; 6