- Correspondence to Márcia Elizabeth Marinho da Silva, General Management of Information Systems, Agency for Health Plans and Insurance (ANS), Av. Augusto Severo, 84, 10°. Andar, Glória, Rio de Janeiro, Rio de Janeiro 22021040, Brazil;
- Received September 5, 2011
- Revised February 7, 2012
- Accepted February 13, 2012
- First published March 8, 2012.
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