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O. Eray,
Y. Çete,
C. Oktay,
B. Karsli,
S. Akça,
N. Çete
and F. Ersoy
(2002).
Intravenous single-dose tramadol versus meperidine for pain relief in renal colic. European Journal of Anaesthesiology,
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,
pp 368-370
doi:10.1017/S0265021502000595