On Doctoring MEDLINE searches, with reference librarian comments, March 2000

The question was

Health Effects of Chronic Marijuana Usage

1     Cannabis/ae,po,de,to [Adverse Effects, Poisoning, Drug    results= 36   
Effects, Toxicity]
2     limit 1 to (human and english language)    results= 32   
3     Marijuana abuse/    results= 499   
4     exp longitudinal studies/    results= 182949   
5     cannabis/    results= 440   
6     4 and 5    results= 23   
7     exp Disease/    results= 207273   
8     3 and 7    results=results= 41   
9     2 or 6 or 8    results= 92   
10     limit 9 to (human and english language)    results= 83   
11    from 10 keep 1-83    results= 83   
12    from 10 keep 1-83    results= 83   
13     from 12 keep 1-83    results= 83   

Reference Librarian comments

Fine job. You might, for some searches, save yourself a little time by checking the "focus" box (to get references that are more assuredly "on target") -- but in this search you were not overwhelmed with too terribly many references. You clearly knew what you were doing with regard to manipulating sets.

Thank you for participating in the exercise...