Response to: letter to the editor: consideration on 'an evaluation of reports of ciprofloxacin, levofloxacin, and moxifloxacin association neuropsychiatric toxicities, long-term disability, and aortic aneurysms/dissections disseminated by the food and drug administration and the European medicines agency' by bennett et al.

Based upon our current understanding, improving the identification and characterization of clinically relevant molecules or pathways responsible for progressive fibrotic diseases and use of the robust preclinical model system to test these will be required to improve the drug development pipeline for pulmonary fibrosis. Combination of appropriate preclinical models with ex vivo (precision-cut lung slices) or in vitro models will benefit high-throughput drug discovery and validation of drug effects.