| CUC | Creatinine-corrected Urine Cotinine |
| FCTC | Framework Convention on Tobacco Control |
| GM | Geometric Mean |
| LSD | Least Significant Difference |
| NNK | Nicotine-derived Nitrosamine Ketone |
| RM-ANOVA | Repeated-Measures Analysis of Variance |
| SHS | Secondhand Smoke |
| THS | Thirdhand Smoke |
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