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PII: S0020-7292(06)00069-5
doi:10.1016/j.ijgo.2006.03.001
© 2006 Published by Elsevier Inc.
PII: S0020-7292(06)00069-5
doi:10.1016/j.ijgo.2006.03.001
© 2006 Published by Elsevier Inc.