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SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study.
Br J Surg. 2021 Sep 27;108(9):1056-1063. doi: 10.1093/bjs/znab101.
Br J Surg. 2021.
PMID: 33761533
Free PMC article.
Determination of morphine in urine by solid-phase immunoextraction and high-performance liquid chromatography with electrochemical detection.
Rashid BA, Aherne GW, Katmeh MF, Kwasowski P, Stevenson D.
Rashid BA, et al.
J Chromatogr A. 1998 Feb 27;797(1-2):245-50. doi: 10.1016/s0021-9673(97)01185-0.
J Chromatogr A. 1998.
PMID: 9542117
Calibration graphs were linear from 100 ng ml-1 to 500 ng ml-1 in urine. The inter-assay R.S.D. was < 10% and the recovery of morphine from urine was > 98%. ...
Calibration graphs were linear from 100 ng ml-1 to 500 ng ml-1 in urine. The inter-assay R.S.D. was < 10% and the recovery of morp
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