TY - JOUR T1 - Author response JF - British Journal of General Practice JO - Br J Gen Pract SP - 518 LP - 519 DO - 10.3399/bjgp22X721013 VL - 72 IS - 724 AU - Dermot Ryan Y1 - 2022/11/01 UR - http://bjgp.org/content/72/724/518.3.abstract N2 - To respond to the letter from Dr Sharvill, the National Institute for Health and Care Excellence (NICE) asthma guideline published in 2017 is contentious.1 It is driven by cost-minimisation and not by clinical need, and does not recognise the limited availability of FeNO testing in … ER -