1 “... endorsed by WHO during the past decade....”

2 “... in countries where lead control measures have been implemented over the past 10-30 years...”

3 “...This document draws on lessons learnt at country, regional and global levels over the past 30 years...”

4 “... of drug development for treatment of TB has evolved over the past ten years and novel drugs are presently...”

5 “... of drug development for treatment of TB has evolved over the past ten years and novel drugs are presently...”