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===2019-2020: [https://pubpeer.com/publications/7571819CEB7A2BC425BE3D7061410D Association of E-Cigarette Use With Respiratory Disease Among Adults: A Longitudinal Analysis]=== | ===2019-2020: [https://pubpeer.com/publications/7571819CEB7A2BC425BE3D7061410D Association of E-Cigarette Use With Respiratory Disease Among Adults: A Longitudinal Analysis]=== | ||
===2017: [https://pubpeer.com/publications/41F6EA57D0803EEE9DF65162DF0097 Electronic Cigarette Use in US Adults at Risk for or with COPD: Analysis from Two Observational Cohorts]=== | |||
=Expressions of Concern (By Journal Staff)= | =Expressions of Concern (By Journal Staff)= | ||
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