Interferences in laboratory reports due to drugs and herbal supplements are well documented in the clinical toxicology literature but there is no one book on the market which covers the entire field of clinical laboratory interferences and erroneous laboratory results. This practical, easy-to-use guide will address interference issues in all laboratory tests, including patient epigenetics, process of specimen collection, enzymes, biomarkers, etc., so that clinicians and laboratory scientists can rely on one reference which speaks to both their needs of accurate specimen analysis and optimal patient care. Practical information for both clinicians and laboratory scientists, presented in the form of tables and charts for easy reference Focus on range and sources of interferences rather than details of toxicologic mechanisms which are well covered in toxicology textbooks Covers interferences across endocrine, oncology, hematology, immunohistochemistry, immunology, serology, microbiology, and molecular testing