School of Public Health & Health Systems, University of Waterloo, Waterloo, Ontario, Canada.
JAMA Pediatr. 2020 Aug 1;174(8):797-800. doi: 10.1001/jamapediatrics.2020.0901.
This cohort study examines rates of vaping and smoking among youths aged 16 to 19 years in the United States, Canada, and England from 2017 to 2019.
本队列研究考察了 2017 年至 2019 年期间美国、加拿大和英国 16 至 19 岁青少年的吸烟和蒸气烟使用情况。