RT Journal Article SR Electronic T1 Lifestyle walks: an outside walking group intervention for patients with mental health issues JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 29 OP 29 DO 10.3399/bjgp20X707537 VO 70 IS 690 A1 Churn, Peter YR 2020 UL http://bjgp.org/content/70/690/29.abstract AB