Effect of pirfenidone on pulmonary fibrosis due to paraquat poisoning in rats. - Seifirad, Soroush; Keshavarz, Amirhossein; Taslimi, Shervin; Aran, Shima; Abbasi, Hamidreza; Ghaffari, Alireza (Clinical Toxicology (15563650), 2012)