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In enigmatic cases where the diagnosis is unclear, obtaining an accurate history often leads to the correct diagnosis. Patients, including those with disorders of brain function, are often unable to give an accurate history, and collateral sources, including electronic medical records, can be the key to arriving at the correct diagnosis. While issues of privacy are a concern, often obtaining vital information is delayed because of fear of the consequences of releasing medical information. When physicians must make critical life-saving or life-altering decisions, this can be a barrier to optimal care.

Although I understand your reasoning that drug screening is often superfluous, there are situations where it is useful.

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