This volume is the perfect handbook and quick reference for any clinical laboratory, allowing clinicians to find the potential source of a false-positive or a false-negative result in the daily operation of a toxicology laboratory. At the same time, this book can also be used as a reference for medical technologists, supervisors, laboratory directors, clinical chemists, toxicologists, and pathologists to find in-depth cause of a potential interference and what tests can be ordered to circumvent such problem.