PT - JOURNAL ARTICLE AU - R Brian Haynes TI - Of studies, summaries, synopses, and systems: the ā€œ4Sā€ evolution of services for finding current best evidence AID - 10.1136/ebmh.4.2.37 DP - 2001 May 01 TA - Evidence Based Mental Health PG - 37--38 VI - 4 IP - 2 4099 - http://mentalhealth.bmj.com//content/4/2/37.short 4100 - http://mentalhealth.bmj.com//content/4/2/37.full SO - Evid Based Ment Health2001 May 01; 4