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J. J. O'Hanlon,
H. Beers,
B. K. D. Huss
and K. R. Milligan
(1996).
A comparison of the effect of intramuscular diclofenac, ketorolac or piroxicam on post-operative pain following laparoscopy. European Journal of Anaesthesiology,
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doi:10.1046/j.1365-2346.1996.d01-365.x