Children Learning About Secondhand Smoke (CLASS III): a protocol for a cluster randomised controlled trial of a school-based smoke-free intervention in Bangladesh and Pakistan.
Rumana HuqueKamran SiddiqiMariam KhokharCath JacksonMona KanaanCatherine HewittIan KellarCharlie WelchSteve ParrottMasuma Pervin MishuAziz SheikhRomaina IqbalPublished in: BMJ open (2023)
ISRCTN28878365.