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Subjective history isn't enough > measure it. I smoke a few a day. I quit a while ago. Not that much. Only socially. #PackYears #ClinicalSkills #RespiratoryCare #NursesLife #Med The Impact of Fluctuations in Pack Year Smoking History in the Electronic Health Record on Lung Cancer Screening Practices CHEST Smoking Pack Years calculator case study Independent Web Marketing PDF) Is calculating pack years retrospectively a valid method to estimate life time tobacco smoking? A comparison between prospectively calculated pack years and retrospectively calculated pack years
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