PT - JOURNAL ARTICLE AU - Klein, Jonathan D AU - Resnick, Elissa A AU - Chamberlin, Margaret E AU - Kress, Elizabeth A TI - Second-hand smoke surveillance and COVID-19: a missed opportunity AID - 10.1136/tobaccocontrol-2021-056532 DP - 2021 Jun 10 TA - Tobacco Control PG - tobaccocontrol-2021-056532 4099 - http://tobaccocontrol.bmj.com/content/early/2021/06/10/tobaccocontrol-2021-056532.short 4100 - http://tobaccocontrol.bmj.com/content/early/2021/06/10/tobaccocontrol-2021-056532.full