Ethics declarations Ethics approval and consent to participate The study was approved by the Ethics Committee of the Institute of Basic Medical Sciences of the Chinese Academy of Medical Sciences (0282013), and all participants written informed consent
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Unlike cigarettes, there's evidence of certain health benefits from marijuana, such as easing chronic pain
Meta-regression indicated that effect sizes were larger for studies that used clinical samples, included more women, measured smoking in adolescence rather than adulthood, conceptualized stimulant treatment as consistent over time, and accounted for comorbid conduct disorder
For the first time, ICD-6 employed three-digit Arabic numerals for class/subclasses and decimal points for subsections, which reflected the hierarchical structure of the classification (see the lower right of Figure 2 below and find components from the website of digitized ICD versions provided by Wolfbane Cybernetic 2001-)