Roger L. Bertholf, PhD

Keyphrases

1. Cocaine 100%
2. Urine Drug Testing 82%
3. Ethanol 66%
4. Electrothermal Atomic Absorption Spectrometry (ETAAS) 52%
5. Urine Drug Test 42%
6. Immunoassay 40%
7. Aluminum Determination 40%
8. Clinical Chemistry 40%
9. Gas Chromatography-mass Spectrometry 37%
10. Urine Specimen 37%
11. Liquid Chromatography-tandem Mass Spectrometry (LC-MS/MS) 35%
12. Opiates 33%
13. Chronic Kidney Disease 33%
14. Benzoylecgonine 32%
15. Clinical Laboratory 32%
16. Analytical Method 32%
17. Iohexol 31%
18. Pain Management 29%
19. Test Interpretation 29%
20. Trace Metals 28%
21. Drug Testing 28%
22. Lactate Dehydrogenase Isoenzymes 26%
23. Ethyl Glucuronide 26%
24. Ethyl Sulfate 26%
25. Kidney Transplant Recipients 26%
26. 1,25-dihydroxyvitamin D3 26%
27. Transferrin 26%
28. Amniotic Fluid 26%
29. Subthreshold 26%
30. 1,25(OH)2D3 26%
31. Meconium 26%
32. Albumin 26%
33. Clinical Toxicology 26%
34. Clinical Application 25%
35. Serum Samples 24%
36. Aluminum Toxicity 24%
37. Chronic Opioid Therapy 24%
38. Laboratory Medicine 23%
39. Laboratory Methods 22%
40. Glomerular Filtration Rate 22%
41. Laboratory Results 21%
42. Cocaine Metabolites 20%
43. Cannabinoids 20%
44. Biological Materials 20%
45. Biological Specimens 20%
46. Laboratory Services 20%
47. Cocaine Use 19%
48. Predictive Value 19%
49. Liver 19%
50. Aluminum Content 19%