PN, L., JS, F., & BA, F. (2014). Estimating the decline in excess risk of chronic obstructive pulmonary disease following quitting smoking - a systematic review based on the negative exponential model. Regulatory toxicology and pharmacology : RTP, 68(2), 231. https://doi.org/10.1016/j.yrtph.2013.12.006
Chicago Style (17th ed.) CitationPN, Lee, Fry JS, and Forey BA. "Estimating the Decline in Excess Risk of Chronic Obstructive Pulmonary Disease Following Quitting Smoking - a Systematic Review Based on the Negative Exponential Model." Regulatory Toxicology and Pharmacology : RTP 68, no. 2 (2014): 231. https://doi.org/10.1016/j.yrtph.2013.12.006.
MLA (9th ed.) CitationPN, Lee, et al. "Estimating the Decline in Excess Risk of Chronic Obstructive Pulmonary Disease Following Quitting Smoking - a Systematic Review Based on the Negative Exponential Model." Regulatory Toxicology and Pharmacology : RTP, vol. 68, no. 2, 2014, p. 231, https://doi.org/10.1016/j.yrtph.2013.12.006.