HIT is caused by the formation of abnormal antibodies that activate platelets. If someone receiving heparin develops new or worsening thrombosis, or if the platelet count falls, HIT can be confirmed with specific blood tests.
For other uses, see Disneyland (disambiguation). Disneyland Park, originally Disneyland, is the first of two theme parks built at the Disneyland Resort in Anaheim, California, opened on July 17, 1955. It is the only theme park designed and built under the direct supervision of Walt Disney.
1 Disney's River Country opened as Walt Disney World's first water park in 1976 and closed in 2001.  The only other Disney park to close, Discovery Island, is also in decay and is just 300 feet from River Country.