Indiana University students have raised roughly $4.2 million for an Indianapolis children's hospital during an annual 36-hour dance marathon.
The McDonald‘s at the Riley Hospital for Children is set to close Dec. 31.
Four people were hospitalized Thursday, but tests for several toxic chemicals that could have been the cause came back negative.
A contributing factor is bottle feeding right before bed to help the child sleep.
IU Dance Marathon is a tradition at Indiana University. Participants celebrated its 20th anniversary this weekend on campus.