Plans for collection, laboratory evaluation, and storage of biological specimens for genetic or molecular analysis in this trial/future use {33}
Exposure to smoke either directly among smokers or indirectly through secondhand smoke will be assessed through self-report and salivary collection.We collect saliva for 25% of recruited individuals from each building on a rolling basis at all assessment timepoints via passive drool collection. Donors tilt their head forward, allowing the saliva to pool on the floor of the mouth, then pass the saliva through the SalivaBio Collection Aid (SCA) into a polypropylene vial. Collection protocols/methods are available online at 