And one of the toughest parts of the sales process is building a prospect list.

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King says that most of his clients are retailers, which are compelled by credit card industry audits to protect the financial data that travel on their networks, but airports are high on his prospect list.

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The prospect of being put on such a list could be enough to prevent someone from seeking care and creates the impression that "you're turning psychologists into police officers, " said Eric Neblung, a psychologist and the president of the New York State Psychological Association.

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