1 “... scientific challenges today. In the last few decades, the biochemical pathway of ethylene production has been...”

2 “.... On the other hand, malignant tumors have been identified in fibrotic tissues decades ago, and now accumulating...”

3 “... been published over the past three decades, they were generated in response to the fact that COPD is a...”

4 “... already been made, giving more opportunities to these patients. However, much remains to be discovered...”