read the article from the link, and identify the study design, study population and sample size, chance, bias, confounding, strength of association, consistency, biological plausibility, temporality and dose response.

Zhang, Y., Feng, Y., Chen, S., Liang, S., Wang, S., Xu, K., Ning, D., Yuan, X., Zhu, H., Pan, H., & Shan, G. (2021). Relationship between the duration of smoking and blood pressure in han and ethnic minority populations: A cross-sectional study in china. BMC Public Health, 21(1). https://doi.org/10.1186/s12889-020-09975-w