Depression follow-up monitoring with the PHQ-9: an open cluster-randomised controlled trial. - Kendrick T; Dowrick C; Lewis G; Moore M; Leydon GM; Geraghty AW; Griffiths G; Zhu S; Yao GL; May C; Gabbay M; Dewar-Haggart R; et al. (The British journal of general practice : the journal of the Royal College of General Practitioners, 2024)