Pretell Cabrera MA, Astete Cornejo J. Spirometric reference equation in men from 2 regions of northern Peru located between 0 and 100 meters above the sea level: Cross-sectional study. Acta Med Peru [Internet]. 2023Dec.2 [cited 2024May20];40(3). Available from: https://amp.cmp.org.pe/index.php/AMP/article/view/2695