Jonathan D Berg

Analytical evidence to show letters impregnated with novel psychoactive substances are a means of getting drugs to inmates within the UK prison service

Loretta Ford, Jonathan D Berg · Annals of Clinical Biochemistry International Journal of Laboratory Medicine · 2018 · 65 citations

Pharmacy, Pharmacology, Toxicology +16

Ethnic Variation of Thiopurine <i>S</i> -Methyltransferase Activity: A Large, Prospective Population Study

Sheldon C. Cooper, Loretta Ford, Jonathan D Berg et al. · Pharmacogenomics · 2008 · 45 citations

Medicine, Hematology, Pharmacology +12

Self-administration of vitamin D supplements in the general public may be associated with high 25-hydroxyvitamin D concentrations

Robyn Shea, Jonathan D Berg · Annals of Clinical Biochemistry International Journal of Laboratory Medicine · 2016 · 36 citations

Agriculture, Nutrition, Public Health Nutrition +14

Analysis of legal high materials by ultra-performance liquid chromatography with time of flight mass spectrometry as part of a toxicology vigilance system: what are the most popular novel psychoactive substances in the UK?

Loretta Ford, Jonathan D Berg · Annals of Clinical Biochemistry International Journal of Laboratory Medicine · 2016 · 18 citations · Full text

Pharmacy, Clinical Toxicology, Toxicology +15

Reference intervals for thiopurine <i>S</i> -methyltransferase activity in red blood cells using 6-thioguanine as substrate and rapid non-extraction liquid chromatography

Loretta Ford, Sheldon C. Cooper, Matthew Lewis et al. · Annals of Clinical Biochemistry International Journal of Laboratory Medicine · 2004 · 16 citations

Medicine, Pharmacology, Chromatographic Analysis +13