The Department of Veterans Affairs (VA) and The Department of Defense (DoD) guidelines are based upon the best information available at the time of publication. They are designed to provide information and assist decision-making. They are not intended to define a standard of care and should not be construed as one. Neither should they be interpreted as prescribing an exclusive course of management.Variations in practice will inevitably and appropriately occur when providers take into account the needs of individual patients, available resources, and limitations unique to an institution or type of practice. Every healthcare professional making use of these guidelines is responsible for evaluating the appropriateness of applying them in the setting of any particular clinical situation.

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The Utopian promise of digital technology is one of hygiene: reproduction without the mess.Walter Benjamin pointed out that mechanical reproduction, despite its own seductive promise, gave rise not to perfect replicas but to all sorts of miserable dichotomies: the original and the copy; the authentic and the inauthentic; the artist's proof and the tacky museum poster. Digital reproduction, however, hopes to refute Benjamin. At last the copy will emerge bit-perfect, atom by atom. Each clone will be indistinguishable from the original, no matter how many generations removed. No placenta.