RT Journal Article SR Electronic T1 Questionnaire severity measures for depression JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 324 OP 325 DO 10.3399/bjgp11X572337 VO 61 IS 586 A1 John Gillies A1 Stewart Mercer A1 Graham CM Watt A1 Mairi Scott A1 Andrew Lyon YR 2011 UL http://bjgp.org/content/61/586/324.3.abstract AB