RT Journal Article SR Electronic T1 Viewpoint: Why do we cry? Are tears ‘purposeless’? JF British Journal of General Practice JO Br J Gen Pract FD British Journal of General Practice SP 179 OP 179 DO 10.3399/bjgp20X709049 VO 70 IS 693 A1 Charlotte Sidebotham YR 2020 UL http://bjgp.org/content/70/693/179.abstract AB