H., H., H. M. H., and F. F. A. S. “IMPACT OF PROLONGED REDUCED-PRESSURE CONDITION PRIOR TO PRECURSOR LABELING ON THE LABELING EFFICIENCY OF F-18 FLUOROCHOLINE SYNTHESIS”. International Journal of Pharmacy and Pharmaceutical Sciences, vol. 10, no. 4, Apr. 2018, pp. 143-5, doi:10.22159/ijpps.2018v10i4.23057.