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Rendering of the new emergency department planned for Children’s Wisconsin’s hospital in Wauwatosa. (Photo: Children’s Wisconsin.)

Children’s Wisconsin is increasing the size of the planned expansion of its hospital in Wauwatosa to include a new emergency department.

The planned changes will increase the projected cost of the expansion to $385 million, up 45% from its initial estimate of $265 million, the health system said in a news release.

Children’s Wisconsin had planned to renovate