DOI: 10.1055/s-00000085

The Thoracic and Cardiovascular Surgeon

References

DeLoach LJ, Higgins MS, Caplan AB, Stiff JL.
The visual analog scale in the immediate postoperative period: intrasubject variability and correlation with a numeric scale. 
Anesth Analg 1998; 86: 102-106  

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